xref: /onnv-gate/usr/src/uts/common/io/ixgbe/ixgbe_main.c (revision 10305:f6df05de8700)

/*
 * CDDL HEADER START
 *
 * Copyright(c) 2007-2009 Intel Corporation. All rights reserved.
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include "ixgbe_sw.h"

static char ident[] = "Intel 10Gb Ethernet";

/*
 * Local function protoypes
 */
static int ixgbe_register_mac(ixgbe_t *);
static int ixgbe_identify_hardware(ixgbe_t *);
static int ixgbe_regs_map(ixgbe_t *);
static void ixgbe_init_properties(ixgbe_t *);
static int ixgbe_init_driver_settings(ixgbe_t *);
static void ixgbe_init_locks(ixgbe_t *);
static void ixgbe_destroy_locks(ixgbe_t *);
static int ixgbe_init(ixgbe_t *);
static int ixgbe_chip_start(ixgbe_t *);
static void ixgbe_chip_stop(ixgbe_t *);
static int ixgbe_reset(ixgbe_t *);
static void ixgbe_tx_clean(ixgbe_t *);
static boolean_t ixgbe_tx_drain(ixgbe_t *);
static boolean_t ixgbe_rx_drain(ixgbe_t *);
static int ixgbe_alloc_rings(ixgbe_t *);
static int ixgbe_init_rings(ixgbe_t *);
static void ixgbe_free_rings(ixgbe_t *);
static void ixgbe_fini_rings(ixgbe_t *);
static void ixgbe_setup_rings(ixgbe_t *);
static void ixgbe_setup_rx(ixgbe_t *);
static void ixgbe_setup_tx(ixgbe_t *);
static void ixgbe_setup_rx_ring(ixgbe_rx_ring_t *);
static void ixgbe_setup_tx_ring(ixgbe_tx_ring_t *);
static void ixgbe_setup_rss(ixgbe_t *);
static void ixgbe_init_unicst(ixgbe_t *);
static int ixgbe_unicst_set(ixgbe_t *, const uint8_t *, int);
static int ixgbe_unicst_find(ixgbe_t *, const uint8_t *);
static void ixgbe_setup_multicst(ixgbe_t *);
static void ixgbe_get_hw_state(ixgbe_t *);
static void ixgbe_get_conf(ixgbe_t *);
static int ixgbe_get_prop(ixgbe_t *, char *, int, int, int);
static void ixgbe_driver_link_check(void *);
static void ixgbe_sfp_check(void *);
static void ixgbe_local_timer(void *);
static void ixgbe_arm_watchdog_timer(ixgbe_t *);
static void ixgbe_restart_watchdog_timer(ixgbe_t *);
static void ixgbe_disable_adapter_interrupts(ixgbe_t *);
static void ixgbe_enable_adapter_interrupts(ixgbe_t *);
static boolean_t is_valid_mac_addr(uint8_t *);
static boolean_t ixgbe_stall_check(ixgbe_t *);
static boolean_t ixgbe_set_loopback_mode(ixgbe_t *, uint32_t);
static void ixgbe_set_internal_mac_loopback(ixgbe_t *);
static boolean_t ixgbe_find_mac_address(ixgbe_t *);
static int ixgbe_alloc_intrs(ixgbe_t *);
static int ixgbe_alloc_intr_handles(ixgbe_t *, int);
static int ixgbe_add_intr_handlers(ixgbe_t *);
static void ixgbe_map_rxring_to_vector(ixgbe_t *, int, int);
static void ixgbe_map_txring_to_vector(ixgbe_t *, int, int);
static void ixgbe_setup_ivar(ixgbe_t *, uint16_t, uint8_t, int8_t);
static void ixgbe_enable_ivar(ixgbe_t *, uint16_t, int8_t);
static void ixgbe_disable_ivar(ixgbe_t *, uint16_t, int8_t);
static int ixgbe_map_intrs_to_vectors(ixgbe_t *);
static void ixgbe_setup_adapter_vector(ixgbe_t *);
static void ixgbe_rem_intr_handlers(ixgbe_t *);
static void ixgbe_rem_intrs(ixgbe_t *);
static int ixgbe_enable_intrs(ixgbe_t *);
static int ixgbe_disable_intrs(ixgbe_t *);
static uint_t ixgbe_intr_legacy(void *, void *);
static uint_t ixgbe_intr_msi(void *, void *);
static uint_t ixgbe_intr_msix(void *, void *);
static void ixgbe_intr_rx_work(ixgbe_rx_ring_t *);
static void ixgbe_intr_tx_work(ixgbe_tx_ring_t *);
static void ixgbe_intr_other_work(ixgbe_t *, uint32_t);
static void ixgbe_get_driver_control(struct ixgbe_hw *);
static int ixgbe_addmac(void *, const uint8_t *);
static int ixgbe_remmac(void *, const uint8_t *);
static void ixgbe_release_driver_control(struct ixgbe_hw *);

static int ixgbe_attach(dev_info_t *, ddi_attach_cmd_t);
static int ixgbe_detach(dev_info_t *, ddi_detach_cmd_t);
static int ixgbe_resume(dev_info_t *);
static int ixgbe_suspend(dev_info_t *);
static void ixgbe_unconfigure(dev_info_t *, ixgbe_t *);
static uint8_t *ixgbe_mc_table_itr(struct ixgbe_hw *, uint8_t **, uint32_t *);

static int ixgbe_fm_error_cb(dev_info_t *dip, ddi_fm_error_t *err,
    const void *impl_data);
static void ixgbe_fm_init(ixgbe_t *);
static void ixgbe_fm_fini(ixgbe_t *);

static struct cb_ops ixgbe_cb_ops = {
	nulldev,		/* cb_open */
	nulldev,		/* cb_close */
	nodev,			/* cb_strategy */
	nodev,			/* cb_print */
	nodev,			/* cb_dump */
	nodev,			/* cb_read */
	nodev,			/* cb_write */
	nodev,			/* cb_ioctl */
	nodev,			/* cb_devmap */
	nodev,			/* cb_mmap */
	nodev,			/* cb_segmap */
	nochpoll,		/* cb_chpoll */
	ddi_prop_op,		/* cb_prop_op */
	NULL,			/* cb_stream */
	D_MP | D_HOTPLUG,	/* cb_flag */
	CB_REV,			/* cb_rev */
	nodev,			/* cb_aread */
	nodev			/* cb_awrite */
};

static struct dev_ops ixgbe_dev_ops = {
	DEVO_REV,		/* devo_rev */
	0,			/* devo_refcnt */
	NULL,			/* devo_getinfo */
	nulldev,		/* devo_identify */
	nulldev,		/* devo_probe */
	ixgbe_attach,		/* devo_attach */
	ixgbe_detach,		/* devo_detach */
	nodev,			/* devo_reset */
	&ixgbe_cb_ops,		/* devo_cb_ops */
	NULL,			/* devo_bus_ops */
	ddi_power,		/* devo_power */
	ddi_quiesce_not_supported,	/* devo_quiesce */
};

static struct modldrv ixgbe_modldrv = {
	&mod_driverops,		/* Type of module.  This one is a driver */
	ident,			/* Discription string */
	&ixgbe_dev_ops		/* driver ops */
};

static struct modlinkage ixgbe_modlinkage = {
	MODREV_1, &ixgbe_modldrv, NULL
};

/*
 * Access attributes for register mapping
 */
ddi_device_acc_attr_t ixgbe_regs_acc_attr = {
	DDI_DEVICE_ATTR_V0,
	DDI_STRUCTURE_LE_ACC,
	DDI_STRICTORDER_ACC,
	DDI_FLAGERR_ACC
};

/*
 * Loopback property
 */
static lb_property_t lb_normal = {
	normal,	"normal", IXGBE_LB_NONE
};

static lb_property_t lb_mac = {
	internal, "MAC", IXGBE_LB_INTERNAL_MAC
};

#define	IXGBE_M_CALLBACK_FLAGS	(MC_IOCTL | MC_GETCAPAB)

static mac_callbacks_t ixgbe_m_callbacks = {
	IXGBE_M_CALLBACK_FLAGS,
	ixgbe_m_stat,
	ixgbe_m_start,
	ixgbe_m_stop,
	ixgbe_m_promisc,
	ixgbe_m_multicst,
	NULL,
	NULL,
	ixgbe_m_ioctl,
	ixgbe_m_getcapab
};

/*
 * Initialize capabilities of each supported adapter type
 */
static adapter_info_t ixgbe_82598eb_cap = {
	64,		/* maximum number of rx queues */
	1,		/* minimum number of rx queues */
	8,		/* default number of rx queues */
	32,		/* maximum number of tx queues */
	1,		/* minimum number of tx queues */
	8,		/* default number of tx queues */
	18,		/* maximum total msix vectors */
	16,		/* maximum number of ring vectors */
	2,		/* maximum number of other vectors */
	IXGBE_EICR_LSC,	/* "other" interrupt types handled */
	(IXGBE_FLAG_DCA_CAPABLE	/* capability flags */
	| IXGBE_FLAG_RSS_CAPABLE
	| IXGBE_FLAG_VMDQ_CAPABLE)
};

static adapter_info_t ixgbe_82599eb_cap = {
	128,		/* maximum number of rx queues */
	1,		/* minimum number of rx queues */
	8,		/* default number of rx queues */
	128,		/* maximum number of tx queues */
	1,		/* minimum number of tx queues */
	8,		/* default number of tx queues */
	64,		/* maximum total msix vectors */
	16,		/* maximum number of ring vectors */
	2,		/* maximum number of other vectors */
	IXGBE_EICR_LSC,	/* "other" interrupt types handled */
	(IXGBE_FLAG_DCA_CAPABLE	/* capability flags */
	| IXGBE_FLAG_RSS_CAPABLE
	| IXGBE_FLAG_VMDQ_CAPABLE)
};

/*
 * Module Initialization Functions.
 */

int
_init(void)
{
	int status;

	mac_init_ops(&ixgbe_dev_ops, MODULE_NAME);

	status = mod_install(&ixgbe_modlinkage);

	if (status != DDI_SUCCESS) {
		mac_fini_ops(&ixgbe_dev_ops);
	}

	return (status);
}

int
_fini(void)
{
	int status;

	status = mod_remove(&ixgbe_modlinkage);

	if (status == DDI_SUCCESS) {
		mac_fini_ops(&ixgbe_dev_ops);
	}

	return (status);
}

int
_info(struct modinfo *modinfop)
{
	int status;

	status = mod_info(&ixgbe_modlinkage, modinfop);

	return (status);
}

/*
 * ixgbe_attach - Driver attach.
 *
 * This function is the device specific initialization entry
 * point. This entry point is required and must be written.
 * The DDI_ATTACH command must be provided in the attach entry
 * point. When attach() is called with cmd set to DDI_ATTACH,
 * all normal kernel services (such as kmem_alloc(9F)) are
 * available for use by the driver.
 *
 * The attach() function will be called once for each instance
 * of  the  device  on  the  system with cmd set to DDI_ATTACH.
 * Until attach() succeeds, the only driver entry points which
 * may be called are open(9E) and getinfo(9E).
 */
static int
ixgbe_attach(dev_info_t *devinfo, ddi_attach_cmd_t cmd)
{
	ixgbe_t *ixgbe;
	struct ixgbe_osdep *osdep;
	struct ixgbe_hw *hw;
	int instance;
	char taskqname[32];

	/*
	 * Check the command and perform corresponding operations
	 */
	switch (cmd) {
	default:
		return (DDI_FAILURE);

	case DDI_RESUME:
		return (ixgbe_resume(devinfo));

	case DDI_ATTACH:
		break;
	}

	/* Get the device instance */
	instance = ddi_get_instance(devinfo);

	/* Allocate memory for the instance data structure */
	ixgbe = kmem_zalloc(sizeof (ixgbe_t), KM_SLEEP);

	ixgbe->dip = devinfo;
	ixgbe->instance = instance;

	hw = &ixgbe->hw;
	osdep = &ixgbe->osdep;
	hw->back = osdep;
	osdep->ixgbe = ixgbe;

	/* Attach the instance pointer to the dev_info data structure */
	ddi_set_driver_private(devinfo, ixgbe);

	/*
	 * Initialize for fma support
	 */
	ixgbe->fm_capabilities = ixgbe_get_prop(ixgbe, PROP_FM_CAPABLE,
	    0, 0x0f, DDI_FM_EREPORT_CAPABLE | DDI_FM_ACCCHK_CAPABLE |
	    DDI_FM_DMACHK_CAPABLE | DDI_FM_ERRCB_CAPABLE);
	ixgbe_fm_init(ixgbe);
	ixgbe->attach_progress |= ATTACH_PROGRESS_FM_INIT;

	/*
	 * Map PCI config space registers
	 */
	if (pci_config_setup(devinfo, &osdep->cfg_handle) != DDI_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to map PCI configurations");
		goto attach_fail;
	}
	ixgbe->attach_progress |= ATTACH_PROGRESS_PCI_CONFIG;

	/*
	 * Identify the chipset family
	 */
	if (ixgbe_identify_hardware(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to identify hardware");
		goto attach_fail;
	}

	/*
	 * Map device registers
	 */
	if (ixgbe_regs_map(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to map device registers");
		goto attach_fail;
	}
	ixgbe->attach_progress |= ATTACH_PROGRESS_REGS_MAP;

	/*
	 * Initialize driver parameters
	 */
	ixgbe_init_properties(ixgbe);
	ixgbe->attach_progress |= ATTACH_PROGRESS_PROPS;

	/*
	 * Allocate interrupts
	 */
	if (ixgbe_alloc_intrs(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to allocate interrupts");
		goto attach_fail;
	}
	ixgbe->attach_progress |= ATTACH_PROGRESS_ALLOC_INTR;

	/*
	 * Allocate rx/tx rings based on the ring numbers.
	 * The actual numbers of rx/tx rings are decided by the number of
	 * allocated interrupt vectors, so we should allocate the rings after
	 * interrupts are allocated.
	 */
	if (ixgbe_alloc_rings(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to allocate rx and tx rings");
		goto attach_fail;
	}
	ixgbe->attach_progress |= ATTACH_PROGRESS_ALLOC_RINGS;

	/*
	 * Map rings to interrupt vectors
	 */
	if (ixgbe_map_intrs_to_vectors(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to map interrupts to vectors");
		goto attach_fail;
	}

	/*
	 * Add interrupt handlers
	 */
	if (ixgbe_add_intr_handlers(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to add interrupt handlers");
		goto attach_fail;
	}
	ixgbe->attach_progress |= ATTACH_PROGRESS_ADD_INTR;

	/*
	 * Create a taskq for link-status-change
	 */
	(void) sprintf(taskqname, "ixgbe%d_taskq", instance);
	if ((ixgbe->lsc_taskq = ddi_taskq_create(devinfo, taskqname,
	    1, TASKQ_DEFAULTPRI, 0)) == NULL) {
		ixgbe_error(ixgbe, "taskq_create failed");
		goto attach_fail;
	}
	ixgbe->attach_progress |= ATTACH_PROGRESS_LSC_TASKQ;

	/*
	 * Initialize driver parameters
	 */
	if (ixgbe_init_driver_settings(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to initialize driver settings");
		goto attach_fail;
	}

	/*
	 * Initialize mutexes for this device.
	 * Do this before enabling the interrupt handler and
	 * register the softint to avoid the condition where
	 * interrupt handler can try using uninitialized mutex.
	 */
	ixgbe_init_locks(ixgbe);
	ixgbe->attach_progress |= ATTACH_PROGRESS_LOCKS;

	/*
	 * Initialize chipset hardware
	 */
	if (ixgbe_init(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to initialize adapter");
		goto attach_fail;
	}
	ixgbe->attach_progress |= ATTACH_PROGRESS_INIT;

	if (ixgbe_check_acc_handle(ixgbe->osdep.cfg_handle) != DDI_FM_OK) {
		ddi_fm_service_impact(ixgbe->dip, DDI_SERVICE_LOST);
		goto attach_fail;
	}

	/*
	 * Initialize DMA and hardware settings for rx/tx rings
	 */
	if (ixgbe_init_rings(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to initialize rings");
		goto attach_fail;
	}
	ixgbe->attach_progress |= ATTACH_PROGRESS_INIT_RINGS;

	/*
	 * Initialize statistics
	 */
	if (ixgbe_init_stats(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to initialize statistics");
		goto attach_fail;
	}
	ixgbe->attach_progress |= ATTACH_PROGRESS_STATS;

	/*
	 * Initialize NDD parameters
	 */
	if (ixgbe_nd_init(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to initialize ndd");
		goto attach_fail;
	}
	ixgbe->attach_progress |= ATTACH_PROGRESS_NDD;

	/*
	 * Register the driver to the MAC
	 */
	if (ixgbe_register_mac(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to register MAC");
		goto attach_fail;
	}
	mac_link_update(ixgbe->mac_hdl, LINK_STATE_UNKNOWN);
	ixgbe->attach_progress |= ATTACH_PROGRESS_MAC;

	/*
	 * Now that mutex locks are initialized, and the chip is also
	 * initialized, enable interrupts.
	 */
	if (ixgbe_enable_intrs(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_error(ixgbe, "Failed to enable DDI interrupts");
		goto attach_fail;
	}
	ixgbe->attach_progress |= ATTACH_PROGRESS_ENABLE_INTR;

	ixgbe->ixgbe_state |= IXGBE_INITIALIZED;

	return (DDI_SUCCESS);

attach_fail:
	ixgbe_unconfigure(devinfo, ixgbe);
	return (DDI_FAILURE);
}

/*
 * ixgbe_detach - Driver detach.
 *
 * The detach() function is the complement of the attach routine.
 * If cmd is set to DDI_DETACH, detach() is used to remove  the
 * state  associated  with  a  given  instance of a device node
 * prior to the removal of that instance from the system.
 *
 * The detach() function will be called once for each  instance
 * of the device for which there has been a successful attach()
 * once there are no longer  any  opens  on  the  device.
 *
 * Interrupts routine are disabled, All memory allocated by this
 * driver are freed.
 */
static int
ixgbe_detach(dev_info_t *devinfo, ddi_detach_cmd_t cmd)
{
	ixgbe_t *ixgbe;

	/*
	 * Check detach command
	 */
	switch (cmd) {
	default:
		return (DDI_FAILURE);

	case DDI_SUSPEND:
		return (ixgbe_suspend(devinfo));

	case DDI_DETACH:
		break;
	}


	/*
	 * Get the pointer to the driver private data structure
	 */
	ixgbe = (ixgbe_t *)ddi_get_driver_private(devinfo);
	if (ixgbe == NULL)
		return (DDI_FAILURE);

	/*
	 * Unregister MAC. If failed, we have to fail the detach
	 */
	if (mac_unregister(ixgbe->mac_hdl) != 0) {
		ixgbe_error(ixgbe, "Failed to unregister MAC");
		return (DDI_FAILURE);
	}
	ixgbe->attach_progress &= ~ATTACH_PROGRESS_MAC;

	/*
	 * If the device is still running, it needs to be stopped first.
	 * This check is necessary because under some specific circumstances,
	 * the detach routine can be called without stopping the interface
	 * first.
	 */
	mutex_enter(&ixgbe->gen_lock);
	if (ixgbe->ixgbe_state & IXGBE_STARTED) {
		ixgbe->ixgbe_state &= ~IXGBE_STARTED;
		ixgbe_stop(ixgbe);
		mutex_exit(&ixgbe->gen_lock);
		/* Disable and stop the watchdog timer */
		ixgbe_disable_watchdog_timer(ixgbe);
	} else
		mutex_exit(&ixgbe->gen_lock);

	/*
	 * Check if there are still rx buffers held by the upper layer.
	 * If so, fail the detach.
	 */
	if (!ixgbe_rx_drain(ixgbe))
		return (DDI_FAILURE);

	/*
	 * Do the remaining unconfigure routines
	 */
	ixgbe_unconfigure(devinfo, ixgbe);

	return (DDI_SUCCESS);
}

static void
ixgbe_unconfigure(dev_info_t *devinfo, ixgbe_t *ixgbe)
{
	/*
	 * Disable interrupt
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_ENABLE_INTR) {
		(void) ixgbe_disable_intrs(ixgbe);
	}

	/*
	 * Unregister MAC
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_MAC) {
		(void) mac_unregister(ixgbe->mac_hdl);
	}

	/*
	 * Free ndd parameters
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_NDD) {
		ixgbe_nd_cleanup(ixgbe);
	}

	/*
	 * Free statistics
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_STATS) {
		kstat_delete((kstat_t *)ixgbe->ixgbe_ks);
	}

	/*
	 * Remove interrupt handlers
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_ADD_INTR) {
		ixgbe_rem_intr_handlers(ixgbe);
	}

	/*
	 * Remove taskq for link-status-change
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_LSC_TASKQ) {
		ddi_taskq_destroy(ixgbe->lsc_taskq);
	}

	/*
	 * Remove interrupts
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_ALLOC_INTR) {
		ixgbe_rem_intrs(ixgbe);
	}

	/*
	 * Remove driver properties
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_PROPS) {
		(void) ddi_prop_remove_all(devinfo);
	}

	/*
	 * Release the DMA resources of rx/tx rings
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_INIT_RINGS) {
		ixgbe_fini_rings(ixgbe);
	}

	/*
	 * Stop the chipset
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_INIT) {
		mutex_enter(&ixgbe->gen_lock);
		ixgbe_chip_stop(ixgbe);
		mutex_exit(&ixgbe->gen_lock);
	}

	/*
	 * Free register handle
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_REGS_MAP) {
		if (ixgbe->osdep.reg_handle != NULL)
			ddi_regs_map_free(&ixgbe->osdep.reg_handle);
	}

	/*
	 * Free PCI config handle
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_PCI_CONFIG) {
		if (ixgbe->osdep.cfg_handle != NULL)
			pci_config_teardown(&ixgbe->osdep.cfg_handle);
	}

	/*
	 * Free locks
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_LOCKS) {
		ixgbe_destroy_locks(ixgbe);
	}

	/*
	 * Free the rx/tx rings
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_ALLOC_RINGS) {
		ixgbe_free_rings(ixgbe);
	}

	/*
	 * Unregister FMA capabilities
	 */
	if (ixgbe->attach_progress & ATTACH_PROGRESS_FM_INIT) {
		ixgbe_fm_fini(ixgbe);
	}

	/*
	 * Free the driver data structure
	 */
	kmem_free(ixgbe, sizeof (ixgbe_t));

	ddi_set_driver_private(devinfo, NULL);
}

/*
 * ixgbe_register_mac - Register the driver and its function pointers with
 * the GLD interface.
 */
static int
ixgbe_register_mac(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	mac_register_t *mac;
	int status;

	if ((mac = mac_alloc(MAC_VERSION)) == NULL)
		return (IXGBE_FAILURE);

	mac->m_type_ident = MAC_PLUGIN_IDENT_ETHER;
	mac->m_driver = ixgbe;
	mac->m_dip = ixgbe->dip;
	mac->m_src_addr = hw->mac.addr;
	mac->m_callbacks = &ixgbe_m_callbacks;
	mac->m_min_sdu = 0;
	mac->m_max_sdu = ixgbe->default_mtu;
	mac->m_margin = VLAN_TAGSZ;
	mac->m_v12n = MAC_VIRT_LEVEL1;

	status = mac_register(mac, &ixgbe->mac_hdl);

	mac_free(mac);

	return ((status == 0) ? IXGBE_SUCCESS : IXGBE_FAILURE);
}

/*
 * ixgbe_identify_hardware - Identify the type of the chipset.
 */
static int
ixgbe_identify_hardware(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	struct ixgbe_osdep *osdep = &ixgbe->osdep;

	/*
	 * Get the device id
	 */
	hw->vendor_id =
	    pci_config_get16(osdep->cfg_handle, PCI_CONF_VENID);
	hw->device_id =
	    pci_config_get16(osdep->cfg_handle, PCI_CONF_DEVID);
	hw->revision_id =
	    pci_config_get8(osdep->cfg_handle, PCI_CONF_REVID);
	hw->subsystem_device_id =
	    pci_config_get16(osdep->cfg_handle, PCI_CONF_SUBSYSID);
	hw->subsystem_vendor_id =
	    pci_config_get16(osdep->cfg_handle, PCI_CONF_SUBVENID);

	/*
	 * Set the mac type of the adapter based on the device id
	 */
	if (ixgbe_set_mac_type(hw) != IXGBE_SUCCESS) {
		return (IXGBE_FAILURE);
	}

	/*
	 * Install adapter capabilities
	 */
	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		ixgbe_log(ixgbe, "identify 82598 adapter\n");
		ixgbe->capab = &ixgbe_82598eb_cap;

		if (ixgbe_get_media_type(hw) == ixgbe_media_type_copper) {
			ixgbe->capab->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
			ixgbe->capab->other_intr |= IXGBE_EICR_GPI_SDP1;
		}
		ixgbe->capab->other_intr |= IXGBE_EICR_LSC;

		break;
	case ixgbe_mac_82599EB:
		ixgbe_log(ixgbe, "identify 82599 adapter\n");
		ixgbe->capab = &ixgbe_82599eb_cap;

		ixgbe->capab->other_intr = (IXGBE_EICR_GPI_SDP1 |
		    IXGBE_EICR_GPI_SDP2 | IXGBE_EICR_LSC);

		break;
	default:
		ixgbe_log(ixgbe,
		    "adapter not supported in ixgbe_identify_hardware(): %d\n",
		    hw->mac.type);
		return (IXGBE_FAILURE);
	}

	return (IXGBE_SUCCESS);
}

/*
 * ixgbe_regs_map - Map the device registers.
 *
 */
static int
ixgbe_regs_map(ixgbe_t *ixgbe)
{
	dev_info_t *devinfo = ixgbe->dip;
	struct ixgbe_hw *hw = &ixgbe->hw;
	struct ixgbe_osdep *osdep = &ixgbe->osdep;
	off_t mem_size;

	/*
	 * First get the size of device registers to be mapped.
	 */
	if (ddi_dev_regsize(devinfo, IXGBE_ADAPTER_REGSET, &mem_size)
	    != DDI_SUCCESS) {
		return (IXGBE_FAILURE);
	}

	/*
	 * Call ddi_regs_map_setup() to map registers
	 */
	if ((ddi_regs_map_setup(devinfo, IXGBE_ADAPTER_REGSET,
	    (caddr_t *)&hw->hw_addr, 0,
	    mem_size, &ixgbe_regs_acc_attr,
	    &osdep->reg_handle)) != DDI_SUCCESS) {
		return (IXGBE_FAILURE);
	}

	return (IXGBE_SUCCESS);
}

/*
 * ixgbe_init_properties - Initialize driver properties.
 */
static void
ixgbe_init_properties(ixgbe_t *ixgbe)
{
	/*
	 * Get conf file properties, including link settings
	 * jumbo frames, ring number, descriptor number, etc.
	 */
	ixgbe_get_conf(ixgbe);
}

/*
 * ixgbe_init_driver_settings - Initialize driver settings.
 *
 * The settings include hardware function pointers, bus information,
 * rx/tx rings settings, link state, and any other parameters that
 * need to be setup during driver initialization.
 */
static int
ixgbe_init_driver_settings(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	dev_info_t *devinfo = ixgbe->dip;
	ixgbe_rx_ring_t *rx_ring;
	ixgbe_tx_ring_t *tx_ring;
	uint32_t rx_size;
	uint32_t tx_size;
	int i;

	/*
	 * Initialize chipset specific hardware function pointers
	 */
	if (ixgbe_init_shared_code(hw) != IXGBE_SUCCESS) {
		return (IXGBE_FAILURE);
	}

	/*
	 * Get the system page size
	 */
	ixgbe->sys_page_size = ddi_ptob(devinfo, (ulong_t)1);

	/*
	 * Set rx buffer size
	 *
	 * The IP header alignment room is counted in the calculation.
	 * The rx buffer size is in unit of 1K that is required by the
	 * chipset hardware.
	 */
	rx_size = ixgbe->max_frame_size + IPHDR_ALIGN_ROOM;
	ixgbe->rx_buf_size = ((rx_size >> 10) +
	    ((rx_size & (((uint32_t)1 << 10) - 1)) > 0 ? 1 : 0)) << 10;

	/*
	 * Set tx buffer size
	 */
	tx_size = ixgbe->max_frame_size;
	ixgbe->tx_buf_size = ((tx_size >> 10) +
	    ((tx_size & (((uint32_t)1 << 10) - 1)) > 0 ? 1 : 0)) << 10;

	/*
	 * Initialize rx/tx rings parameters
	 */
	for (i = 0; i < ixgbe->num_rx_rings; i++) {
		rx_ring = &ixgbe->rx_rings[i];
		rx_ring->index = i;
		rx_ring->ixgbe = ixgbe;

		rx_ring->ring_size = ixgbe->rx_ring_size;
		rx_ring->free_list_size = ixgbe->rx_ring_size;
		rx_ring->copy_thresh = ixgbe->rx_copy_thresh;
		rx_ring->limit_per_intr = ixgbe->rx_limit_per_intr;
	}

	for (i = 0; i < ixgbe->num_tx_rings; i++) {
		tx_ring = &ixgbe->tx_rings[i];
		tx_ring->index = i;
		tx_ring->ixgbe = ixgbe;
		if (ixgbe->tx_head_wb_enable)
			tx_ring->tx_recycle = ixgbe_tx_recycle_head_wb;
		else
			tx_ring->tx_recycle = ixgbe_tx_recycle_legacy;

		tx_ring->ring_size = ixgbe->tx_ring_size;
		tx_ring->free_list_size = ixgbe->tx_ring_size +
		    (ixgbe->tx_ring_size >> 1);
		tx_ring->copy_thresh = ixgbe->tx_copy_thresh;
		tx_ring->recycle_thresh = ixgbe->tx_recycle_thresh;
		tx_ring->overload_thresh = ixgbe->tx_overload_thresh;
	tx_ring->resched_thresh = ixgbe->tx_resched_thresh;
	}

	/*
	 * Initialize values of interrupt throttling rate
	 */
	for (i = 1; i < MAX_INTR_VECTOR; i++)
		ixgbe->intr_throttling[i] = ixgbe->intr_throttling[0];

	/*
	 * The initial link state should be "unknown"
	 */
	ixgbe->link_state = LINK_STATE_UNKNOWN;

	return (IXGBE_SUCCESS);
}

/*
 * ixgbe_init_locks - Initialize locks.
 */
static void
ixgbe_init_locks(ixgbe_t *ixgbe)
{
	ixgbe_rx_ring_t *rx_ring;
	ixgbe_tx_ring_t *tx_ring;
	int i;

	for (i = 0; i < ixgbe->num_rx_rings; i++) {
		rx_ring = &ixgbe->rx_rings[i];
		mutex_init(&rx_ring->rx_lock, NULL,
		    MUTEX_DRIVER, DDI_INTR_PRI(ixgbe->intr_pri));
		mutex_init(&rx_ring->recycle_lock, NULL,
		    MUTEX_DRIVER, DDI_INTR_PRI(ixgbe->intr_pri));
	}

	for (i = 0; i < ixgbe->num_tx_rings; i++) {
		tx_ring = &ixgbe->tx_rings[i];
		mutex_init(&tx_ring->tx_lock, NULL,
		    MUTEX_DRIVER, DDI_INTR_PRI(ixgbe->intr_pri));
		mutex_init(&tx_ring->recycle_lock, NULL,
		    MUTEX_DRIVER, DDI_INTR_PRI(ixgbe->intr_pri));
		mutex_init(&tx_ring->tcb_head_lock, NULL,
		    MUTEX_DRIVER, DDI_INTR_PRI(ixgbe->intr_pri));
		mutex_init(&tx_ring->tcb_tail_lock, NULL,
		    MUTEX_DRIVER, DDI_INTR_PRI(ixgbe->intr_pri));
	}

	mutex_init(&ixgbe->gen_lock, NULL,
	    MUTEX_DRIVER, DDI_INTR_PRI(ixgbe->intr_pri));

	mutex_init(&ixgbe->watchdog_lock, NULL,
	    MUTEX_DRIVER, DDI_INTR_PRI(ixgbe->intr_pri));
}

/*
 * ixgbe_destroy_locks - Destroy locks.
 */
static void
ixgbe_destroy_locks(ixgbe_t *ixgbe)
{
	ixgbe_rx_ring_t *rx_ring;
	ixgbe_tx_ring_t *tx_ring;
	int i;

	for (i = 0; i < ixgbe->num_rx_rings; i++) {
		rx_ring = &ixgbe->rx_rings[i];
		mutex_destroy(&rx_ring->rx_lock);
		mutex_destroy(&rx_ring->recycle_lock);
	}

	for (i = 0; i < ixgbe->num_tx_rings; i++) {
		tx_ring = &ixgbe->tx_rings[i];
		mutex_destroy(&tx_ring->tx_lock);
		mutex_destroy(&tx_ring->recycle_lock);
		mutex_destroy(&tx_ring->tcb_head_lock);
		mutex_destroy(&tx_ring->tcb_tail_lock);
	}

	mutex_destroy(&ixgbe->gen_lock);
	mutex_destroy(&ixgbe->watchdog_lock);
}

static int
ixgbe_resume(dev_info_t *devinfo)
{
	ixgbe_t *ixgbe;

	ixgbe = (ixgbe_t *)ddi_get_driver_private(devinfo);
	if (ixgbe == NULL)
		return (DDI_FAILURE);

	mutex_enter(&ixgbe->gen_lock);

	if (ixgbe->ixgbe_state & IXGBE_STARTED) {
		if (ixgbe_start(ixgbe) != IXGBE_SUCCESS) {
			mutex_exit(&ixgbe->gen_lock);
			return (DDI_FAILURE);
		}

		/*
		 * Enable and start the watchdog timer
		 */
		ixgbe_enable_watchdog_timer(ixgbe);
	}

	ixgbe->ixgbe_state &= ~IXGBE_SUSPENDED;

	mutex_exit(&ixgbe->gen_lock);

	return (DDI_SUCCESS);
}

static int
ixgbe_suspend(dev_info_t *devinfo)
{
	ixgbe_t *ixgbe;

	ixgbe = (ixgbe_t *)ddi_get_driver_private(devinfo);
	if (ixgbe == NULL)
		return (DDI_FAILURE);

	mutex_enter(&ixgbe->gen_lock);

	ixgbe->ixgbe_state |= IXGBE_SUSPENDED;

	ixgbe_stop(ixgbe);

	mutex_exit(&ixgbe->gen_lock);

	/*
	 * Disable and stop the watchdog timer
	 */
	ixgbe_disable_watchdog_timer(ixgbe);

	return (DDI_SUCCESS);
}

/*
 * ixgbe_init - Initialize the device.
 */
static int
ixgbe_init(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;

	mutex_enter(&ixgbe->gen_lock);

	/*
	 * Reset chipset to put the hardware in a known state
	 * before we try to do anything with the eeprom.
	 */
	if (ixgbe_reset_hw(hw) != IXGBE_SUCCESS) {
		ixgbe_fm_ereport(ixgbe, DDI_FM_DEVICE_INVAL_STATE);
		goto init_fail;
	}

	/*
	 * Need to init eeprom before validating the checksum.
	 */
	if (ixgbe_init_eeprom_params(hw) < 0) {
		ixgbe_error(ixgbe,
		    "Unable to intitialize the eeprom interface.");
		ixgbe_fm_ereport(ixgbe, DDI_FM_DEVICE_INVAL_STATE);
		goto init_fail;
	}

	/*
	 * NVM validation
	 */
	if (ixgbe_validate_eeprom_checksum(hw, NULL) < 0) {
		/*
		 * Some PCI-E parts fail the first check due to
		 * the link being in sleep state.  Call it again,
		 * if it fails a second time it's a real issue.
		 */
		if (ixgbe_validate_eeprom_checksum(hw, NULL) < 0) {
			ixgbe_error(ixgbe,
			    "Invalid NVM checksum. Please contact "
			    "the vendor to update the NVM.");
			ixgbe_fm_ereport(ixgbe, DDI_FM_DEVICE_INVAL_STATE);
			goto init_fail;
		}
	}

	/*
	 * Setup default flow control thresholds - enable/disable
	 * & flow control type is controlled by ixgbe.conf
	 */
	hw->fc.high_water = DEFAULT_FCRTH;
	hw->fc.low_water = DEFAULT_FCRTL;
	hw->fc.pause_time = DEFAULT_FCPAUSE;
	hw->fc.send_xon = B_TRUE;

	/*
	 * Don't wait for auto-negotiation to complete
	 */
	hw->phy.autoneg_wait_to_complete = B_FALSE;

	/*
	 * Initialize link settings
	 */
	(void) ixgbe_driver_setup_link(ixgbe, B_FALSE);

	/*
	 * Initialize the chipset hardware
	 */
	if (ixgbe_chip_start(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_fm_ereport(ixgbe, DDI_FM_DEVICE_INVAL_STATE);
		goto init_fail;
	}

	if (ixgbe_check_acc_handle(ixgbe->osdep.cfg_handle) != DDI_FM_OK) {
		goto init_fail;
	}
	if (ixgbe_check_acc_handle(ixgbe->osdep.reg_handle) != DDI_FM_OK) {
		goto init_fail;
	}

	mutex_exit(&ixgbe->gen_lock);
	return (IXGBE_SUCCESS);

init_fail:
	/*
	 * Reset PHY
	 */
	(void) ixgbe_reset_phy(hw);

	mutex_exit(&ixgbe->gen_lock);
	ddi_fm_service_impact(ixgbe->dip, DDI_SERVICE_LOST);
	return (IXGBE_FAILURE);
}

/*
 * ixgbe_init_rings - Allocate DMA resources for all rx/tx rings and
 * initialize relevant hardware settings.
 */
static int
ixgbe_init_rings(ixgbe_t *ixgbe)
{
	int i;

	/*
	 * Allocate buffers for all the rx/tx rings
	 */
	if (ixgbe_alloc_dma(ixgbe) != IXGBE_SUCCESS)
		return (IXGBE_FAILURE);

	/*
	 * Setup the rx/tx rings
	 */
	mutex_enter(&ixgbe->gen_lock);

	for (i = 0; i < ixgbe->num_rx_rings; i++)
		mutex_enter(&ixgbe->rx_rings[i].rx_lock);
	for (i = 0; i < ixgbe->num_tx_rings; i++)
		mutex_enter(&ixgbe->tx_rings[i].tx_lock);

	ixgbe_setup_rings(ixgbe);

	for (i = ixgbe->num_tx_rings - 1; i >= 0; i--)
		mutex_exit(&ixgbe->tx_rings[i].tx_lock);
	for (i = ixgbe->num_rx_rings - 1; i >= 0; i--)
		mutex_exit(&ixgbe->rx_rings[i].rx_lock);

	mutex_exit(&ixgbe->gen_lock);

	return (IXGBE_SUCCESS);
}

/*
 * ixgbe_fini_rings - Release DMA resources of all rx/tx rings.
 */
static void
ixgbe_fini_rings(ixgbe_t *ixgbe)
{
	/*
	 * Release the DMA/memory resources of rx/tx rings
	 */
	ixgbe_free_dma(ixgbe);
}

/*
 * ixgbe_chip_start - Initialize and start the chipset hardware.
 */
static int
ixgbe_chip_start(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	int ret_val, i;

	ASSERT(mutex_owned(&ixgbe->gen_lock));

	/*
	 * Get the mac address
	 * This function should handle SPARC case correctly.
	 */
	if (!ixgbe_find_mac_address(ixgbe)) {
		ixgbe_error(ixgbe, "Failed to get the mac address");
		return (IXGBE_FAILURE);
	}

	/*
	 * Validate the mac address
	 */
	(void) ixgbe_init_rx_addrs(hw);
	if (!is_valid_mac_addr(hw->mac.addr)) {
		ixgbe_error(ixgbe, "Invalid mac address");
		return (IXGBE_FAILURE);
	}

	/*
	 * Configure/Initialize hardware
	 */
	ret_val = ixgbe_init_hw(hw);
	if (ret_val != IXGBE_SUCCESS) {
		if (ret_val == IXGBE_ERR_EEPROM_VERSION) {
			ixgbe_error(ixgbe,
			    "This 82599 device is pre-release and contains"
			    " outdated firmware, please contact your hardware"
			    " vendor for a replacement.");
		} else {
			ixgbe_error(ixgbe, "Failed to initialize hardware");
			return (IXGBE_FAILURE);
		}
	}

	/*
	 * Setup adapter interrupt vectors
	 */
	ixgbe_setup_adapter_vector(ixgbe);

	/*
	 * Initialize unicast addresses.
	 */
	ixgbe_init_unicst(ixgbe);

	/*
	 * Setup and initialize the mctable structures.
	 */
	ixgbe_setup_multicst(ixgbe);

	/*
	 * Set interrupt throttling rate
	 */
	for (i = 0; i < ixgbe->intr_cnt; i++) {
		IXGBE_WRITE_REG(hw, IXGBE_EITR(i), ixgbe->intr_throttling[i]);
	}

	/*
	 * Save the state of the phy
	 */
	ixgbe_get_hw_state(ixgbe);

	/*
	 * Make sure driver has control
	 */
	ixgbe_get_driver_control(hw);

	return (IXGBE_SUCCESS);
}

/*
 * ixgbe_chip_stop - Stop the chipset hardware
 */
static void
ixgbe_chip_stop(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;

	ASSERT(mutex_owned(&ixgbe->gen_lock));

	/*
	 * Tell firmware driver is no longer in control
	 */
	ixgbe_release_driver_control(hw);

	/*
	 * Reset the chipset
	 */
	(void) ixgbe_reset_hw(hw);

	/*
	 * Reset PHY
	 */
	(void) ixgbe_reset_phy(hw);
}

/*
 * ixgbe_reset - Reset the chipset and re-start the driver.
 *
 * It involves stopping and re-starting the chipset,
 * and re-configuring the rx/tx rings.
 */
static int
ixgbe_reset(ixgbe_t *ixgbe)
{
	int i;

	mutex_enter(&ixgbe->gen_lock);

	ASSERT(ixgbe->ixgbe_state & IXGBE_STARTED);
	ixgbe->ixgbe_state &= ~IXGBE_STARTED;

	/*
	 * Disable the adapter interrupts to stop any rx/tx activities
	 * before draining pending data and resetting hardware.
	 */
	ixgbe_disable_adapter_interrupts(ixgbe);

	/*
	 * Drain the pending transmit packets
	 */
	(void) ixgbe_tx_drain(ixgbe);

	for (i = 0; i < ixgbe->num_rx_rings; i++)
		mutex_enter(&ixgbe->rx_rings[i].rx_lock);
	for (i = 0; i < ixgbe->num_tx_rings; i++)
		mutex_enter(&ixgbe->tx_rings[i].tx_lock);

	/*
	 * Stop the chipset hardware
	 */
	ixgbe_chip_stop(ixgbe);

	/*
	 * Clean the pending tx data/resources
	 */
	ixgbe_tx_clean(ixgbe);

	/*
	 * Start the chipset hardware
	 */
	if (ixgbe_chip_start(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_fm_ereport(ixgbe, DDI_FM_DEVICE_INVAL_STATE);
		goto reset_failure;
	}

	if (ixgbe_check_acc_handle(ixgbe->osdep.reg_handle) != DDI_FM_OK) {
		goto reset_failure;
	}

	/*
	 * Setup the rx/tx rings
	 */
	ixgbe_setup_rings(ixgbe);

	/*
	 * Enable adapter interrupts
	 * The interrupts must be enabled after the driver state is START
	 */
	ixgbe_enable_adapter_interrupts(ixgbe);

	for (i = ixgbe->num_tx_rings - 1; i >= 0; i--)
		mutex_exit(&ixgbe->tx_rings[i].tx_lock);
	for (i = ixgbe->num_rx_rings - 1; i >= 0; i--)
		mutex_exit(&ixgbe->rx_rings[i].rx_lock);

	ixgbe->ixgbe_state |= IXGBE_STARTED;
	mutex_exit(&ixgbe->gen_lock);

	return (IXGBE_SUCCESS);

reset_failure:
	for (i = ixgbe->num_tx_rings - 1; i >= 0; i--)
		mutex_exit(&ixgbe->tx_rings[i].tx_lock);
	for (i = ixgbe->num_rx_rings - 1; i >= 0; i--)
		mutex_exit(&ixgbe->rx_rings[i].rx_lock);

	mutex_exit(&ixgbe->gen_lock);

	ddi_fm_service_impact(ixgbe->dip, DDI_SERVICE_LOST);

	return (IXGBE_FAILURE);
}

/*
 * ixgbe_tx_clean - Clean the pending transmit packets and DMA resources.
 */
static void
ixgbe_tx_clean(ixgbe_t *ixgbe)
{
	ixgbe_tx_ring_t *tx_ring;
	tx_control_block_t *tcb;
	link_list_t pending_list;
	uint32_t desc_num;
	int i, j;

	LINK_LIST_INIT(&pending_list);

	for (i = 0; i < ixgbe->num_tx_rings; i++) {
		tx_ring = &ixgbe->tx_rings[i];

		mutex_enter(&tx_ring->recycle_lock);

		/*
		 * Clean the pending tx data - the pending packets in the
		 * work_list that have no chances to be transmitted again.
		 *
		 * We must ensure the chipset is stopped or the link is down
		 * before cleaning the transmit packets.
		 */
		desc_num = 0;
		for (j = 0; j < tx_ring->ring_size; j++) {
			tcb = tx_ring->work_list[j];
			if (tcb != NULL) {
				desc_num += tcb->desc_num;

				tx_ring->work_list[j] = NULL;

				ixgbe_free_tcb(tcb);

				LIST_PUSH_TAIL(&pending_list, &tcb->link);
			}
		}

		if (desc_num > 0) {
			atomic_add_32(&tx_ring->tbd_free, desc_num);
			ASSERT(tx_ring->tbd_free == tx_ring->ring_size);

			/*
			 * Reset the head and tail pointers of the tbd ring;
			 * Reset the writeback head if it's enable.
			 */
			tx_ring->tbd_head = 0;
			tx_ring->tbd_tail = 0;
			if (ixgbe->tx_head_wb_enable)
				*tx_ring->tbd_head_wb = 0;

			IXGBE_WRITE_REG(&ixgbe->hw,
			    IXGBE_TDH(tx_ring->index), 0);
			IXGBE_WRITE_REG(&ixgbe->hw,
			    IXGBE_TDT(tx_ring->index), 0);
		}

		mutex_exit(&tx_ring->recycle_lock);

		/*
		 * Add the tx control blocks in the pending list to
		 * the free list.
		 */
		ixgbe_put_free_list(tx_ring, &pending_list);
	}
}

/*
 * ixgbe_tx_drain - Drain the tx rings to allow pending packets to be
 * transmitted.
 */
static boolean_t
ixgbe_tx_drain(ixgbe_t *ixgbe)
{
	ixgbe_tx_ring_t *tx_ring;
	boolean_t done;
	int i, j;

	/*
	 * Wait for a specific time to allow pending tx packets
	 * to be transmitted.
	 *
	 * Check the counter tbd_free to see if transmission is done.
	 * No lock protection is needed here.
	 *
	 * Return B_TRUE if all pending packets have been transmitted;
	 * Otherwise return B_FALSE;
	 */
	for (i = 0; i < TX_DRAIN_TIME; i++) {

		done = B_TRUE;
		for (j = 0; j < ixgbe->num_tx_rings; j++) {
			tx_ring = &ixgbe->tx_rings[j];
			done = done &&
			    (tx_ring->tbd_free == tx_ring->ring_size);
		}

		if (done)
			break;

		msec_delay(1);
	}

	return (done);
}

/*
 * ixgbe_rx_drain - Wait for all rx buffers to be released by upper layer.
 */
static boolean_t
ixgbe_rx_drain(ixgbe_t *ixgbe)
{
	ixgbe_rx_ring_t *rx_ring;
	boolean_t done;
	int i, j;

	/*
	 * Polling the rx free list to check if those rx buffers held by
	 * the upper layer are released.
	 *
	 * Check the counter rcb_free to see if all pending buffers are
	 * released. No lock protection is needed here.
	 *
	 * Return B_TRUE if all pending buffers have been released;
	 * Otherwise return B_FALSE;
	 */
	for (i = 0; i < RX_DRAIN_TIME; i++) {

		done = B_TRUE;
		for (j = 0; j < ixgbe->num_rx_rings; j++) {
			rx_ring = &ixgbe->rx_rings[j];
			done = done &&
			    (rx_ring->rcb_free == rx_ring->free_list_size);
		}

		if (done)
			break;

		msec_delay(1);
	}

	return (done);
}

/*
 * ixgbe_start - Start the driver/chipset.
 */
int
ixgbe_start(ixgbe_t *ixgbe)
{
	int i;

	ASSERT(mutex_owned(&ixgbe->gen_lock));

	for (i = 0; i < ixgbe->num_rx_rings; i++)
		mutex_enter(&ixgbe->rx_rings[i].rx_lock);
	for (i = 0; i < ixgbe->num_tx_rings; i++)
		mutex_enter(&ixgbe->tx_rings[i].tx_lock);

	/*
	 * Start the chipset hardware
	 */
	if (ixgbe_chip_start(ixgbe) != IXGBE_SUCCESS) {
		ixgbe_fm_ereport(ixgbe, DDI_FM_DEVICE_INVAL_STATE);
		goto start_failure;
	}

	if (ixgbe_check_acc_handle(ixgbe->osdep.reg_handle) != DDI_FM_OK) {
		goto start_failure;
	}

	/*
	 * Setup the rx/tx rings
	 */
	ixgbe_setup_rings(ixgbe);

	/*
	 * Enable adapter interrupts
	 * The interrupts must be enabled after the driver state is START
	 */
	ixgbe_enable_adapter_interrupts(ixgbe);

	for (i = ixgbe->num_tx_rings - 1; i >= 0; i--)
		mutex_exit(&ixgbe->tx_rings[i].tx_lock);
	for (i = ixgbe->num_rx_rings - 1; i >= 0; i--)
		mutex_exit(&ixgbe->rx_rings[i].rx_lock);

	return (IXGBE_SUCCESS);

start_failure:
	for (i = ixgbe->num_tx_rings - 1; i >= 0; i--)
		mutex_exit(&ixgbe->tx_rings[i].tx_lock);
	for (i = ixgbe->num_rx_rings - 1; i >= 0; i--)
		mutex_exit(&ixgbe->rx_rings[i].rx_lock);

	ddi_fm_service_impact(ixgbe->dip, DDI_SERVICE_LOST);

	return (IXGBE_FAILURE);
}

/*
 * ixgbe_stop - Stop the driver/chipset.
 */
void
ixgbe_stop(ixgbe_t *ixgbe)
{
	int i;

	ASSERT(mutex_owned(&ixgbe->gen_lock));

	/*
	 * Disable the adapter interrupts
	 */
	ixgbe_disable_adapter_interrupts(ixgbe);

	/*
	 * Drain the pending tx packets
	 */
	(void) ixgbe_tx_drain(ixgbe);

	for (i = 0; i < ixgbe->num_rx_rings; i++)
		mutex_enter(&ixgbe->rx_rings[i].rx_lock);
	for (i = 0; i < ixgbe->num_tx_rings; i++)
		mutex_enter(&ixgbe->tx_rings[i].tx_lock);

	/*
	 * Stop the chipset hardware
	 */
	ixgbe_chip_stop(ixgbe);

	if (ixgbe_check_acc_handle(ixgbe->osdep.reg_handle) != DDI_FM_OK) {
		ddi_fm_service_impact(ixgbe->dip, DDI_SERVICE_LOST);
	}

	/*
	 * Clean the pending tx data/resources
	 */
	ixgbe_tx_clean(ixgbe);

	for (i = ixgbe->num_tx_rings - 1; i >= 0; i--)
		mutex_exit(&ixgbe->tx_rings[i].tx_lock);
	for (i = ixgbe->num_rx_rings - 1; i >= 0; i--)
		mutex_exit(&ixgbe->rx_rings[i].rx_lock);
}

/*
 * ixgbe_alloc_rings - Allocate memory space for rx/tx rings.
 */
static int
ixgbe_alloc_rings(ixgbe_t *ixgbe)
{
	/*
	 * Allocate memory space for rx rings
	 */
	ixgbe->rx_rings = kmem_zalloc(
	    sizeof (ixgbe_rx_ring_t) * ixgbe->num_rx_rings,
	    KM_NOSLEEP);

	if (ixgbe->rx_rings == NULL) {
		return (IXGBE_FAILURE);
	}

	/*
	 * Allocate memory space for tx rings
	 */
	ixgbe->tx_rings = kmem_zalloc(
	    sizeof (ixgbe_tx_ring_t) * ixgbe->num_tx_rings,
	    KM_NOSLEEP);

	if (ixgbe->tx_rings == NULL) {
		kmem_free(ixgbe->rx_rings,
		    sizeof (ixgbe_rx_ring_t) * ixgbe->num_rx_rings);
		ixgbe->rx_rings = NULL;
		return (IXGBE_FAILURE);
	}

	/*
	 * Allocate memory space for rx ring groups
	 */
	ixgbe->rx_groups = kmem_zalloc(
	    sizeof (ixgbe_rx_group_t) * ixgbe->num_rx_groups,
	    KM_NOSLEEP);

	if (ixgbe->rx_groups == NULL) {
		kmem_free(ixgbe->rx_rings,
		    sizeof (ixgbe_rx_ring_t) * ixgbe->num_rx_rings);
		kmem_free(ixgbe->tx_rings,
		    sizeof (ixgbe_tx_ring_t) * ixgbe->num_tx_rings);
		ixgbe->rx_rings = NULL;
		ixgbe->tx_rings = NULL;
		return (IXGBE_FAILURE);
	}

	return (IXGBE_SUCCESS);
}

/*
 * ixgbe_free_rings - Free the memory space of rx/tx rings.
 */
static void
ixgbe_free_rings(ixgbe_t *ixgbe)
{
	if (ixgbe->rx_rings != NULL) {
		kmem_free(ixgbe->rx_rings,
		    sizeof (ixgbe_rx_ring_t) * ixgbe->num_rx_rings);
		ixgbe->rx_rings = NULL;
	}

	if (ixgbe->tx_rings != NULL) {
		kmem_free(ixgbe->tx_rings,
		    sizeof (ixgbe_tx_ring_t) * ixgbe->num_tx_rings);
		ixgbe->tx_rings = NULL;
	}

	if (ixgbe->rx_groups != NULL) {
		kmem_free(ixgbe->rx_groups,
		    sizeof (ixgbe_rx_group_t) * ixgbe->num_rx_groups);
		ixgbe->rx_groups = NULL;
	}
}

/*
 * ixgbe_setup_rings - Setup rx/tx rings.
 */
static void
ixgbe_setup_rings(ixgbe_t *ixgbe)
{
	/*
	 * Setup the rx/tx rings, including the following:
	 *
	 * 1. Setup the descriptor ring and the control block buffers;
	 * 2. Initialize necessary registers for receive/transmit;
	 * 3. Initialize software pointers/parameters for receive/transmit;
	 */
	ixgbe_setup_rx(ixgbe);

	ixgbe_setup_tx(ixgbe);
}

static void
ixgbe_setup_rx_ring(ixgbe_rx_ring_t *rx_ring)
{
	ixgbe_t *ixgbe = rx_ring->ixgbe;
	struct ixgbe_hw *hw = &ixgbe->hw;
	rx_control_block_t *rcb;
	union ixgbe_adv_rx_desc	*rbd;
	uint32_t size;
	uint32_t buf_low;
	uint32_t buf_high;
	uint32_t reg_val;
	int i;

	ASSERT(mutex_owned(&rx_ring->rx_lock));
	ASSERT(mutex_owned(&ixgbe->gen_lock));

	for (i = 0; i < ixgbe->rx_ring_size; i++) {
		rcb = rx_ring->work_list[i];
		rbd = &rx_ring->rbd_ring[i];

		rbd->read.pkt_addr = rcb->rx_buf.dma_address;
		rbd->read.hdr_addr = NULL;
	}

	/*
	 * Initialize the length register
	 */
	size = rx_ring->ring_size * sizeof (union ixgbe_adv_rx_desc);
	IXGBE_WRITE_REG(hw, IXGBE_RDLEN(rx_ring->index), size);

	/*
	 * Initialize the base address registers
	 */
	buf_low = (uint32_t)rx_ring->rbd_area.dma_address;
	buf_high = (uint32_t)(rx_ring->rbd_area.dma_address >> 32);
	IXGBE_WRITE_REG(hw, IXGBE_RDBAH(rx_ring->index), buf_high);
	IXGBE_WRITE_REG(hw, IXGBE_RDBAL(rx_ring->index), buf_low);

	/*
	 * Setup head & tail pointers
	 */
	IXGBE_WRITE_REG(hw, IXGBE_RDT(rx_ring->index), rx_ring->ring_size - 1);
	IXGBE_WRITE_REG(hw, IXGBE_RDH(rx_ring->index), 0);

	rx_ring->rbd_next = 0;

	/*
	 * Note: Considering the case that the chipset is being reset
	 * and there are still some buffers held by the upper layer,
	 * we should not reset the values of rcb_head, rcb_tail and
	 * rcb_free if the state is not IXGBE_UNKNOWN.
	 */
	if (ixgbe->ixgbe_state == IXGBE_UNKNOWN) {
		rx_ring->rcb_head = 0;
		rx_ring->rcb_tail = 0;
		rx_ring->rcb_free = rx_ring->free_list_size;
	}

	/*
	 * Setup the Receive Descriptor Control Register (RXDCTL)
	 * PTHRESH=32 descriptors (half the internal cache)
	 * HTHRESH=0 descriptors (to minimize latency on fetch)
	 * WTHRESH defaults to 1 (writeback each descriptor)
	 */
	reg_val = IXGBE_READ_REG(hw, IXGBE_RXDCTL(rx_ring->index));
	reg_val |= IXGBE_RXDCTL_ENABLE;	/* enable queue */

	/* Not a valid value for 82599 */
	if (hw->mac.type < ixgbe_mac_82599EB) {
		reg_val |= 0x0020;	/* pthresh */
	}
	IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(rx_ring->index), reg_val);

	if (hw->mac.type == ixgbe_mac_82599EB) {
		reg_val = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
		reg_val |= (IXGBE_RDRXCTL_CRCSTRIP | IXGBE_RDRXCTL_AGGDIS);
		IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, reg_val);
	}

	/*
	 * Setup the Split and Replication Receive Control Register.
	 * Set the rx buffer size and the advanced descriptor type.
	 */
	reg_val = (ixgbe->rx_buf_size >> IXGBE_SRRCTL_BSIZEPKT_SHIFT) |
	    IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
	reg_val |= IXGBE_SRRCTL_DROP_EN;
	IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(rx_ring->index), reg_val);
}

static void
ixgbe_setup_rx(ixgbe_t *ixgbe)
{
	ixgbe_rx_ring_t *rx_ring;
	struct ixgbe_hw *hw = &ixgbe->hw;
	ixgbe_rx_group_t *rx_group;
	uint32_t reg_val;
	uint32_t ring_mapping;
	int i;

	/* PSRTYPE must be configured for 82599 */
	reg_val = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |
	    IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR;
#define	IXGBE_PSRTYPE_L2_PKT	0x00001000
	reg_val |= IXGBE_PSRTYPE_L2_PKT;
	reg_val |= 0xE0000000;
	IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(0), reg_val);

	/*
	 * Set filter control in FCTRL to accept broadcast packets and do
	 * not pass pause frames to host.  Flow control settings are already
	 * in this register, so preserve them.
	 */
	reg_val = IXGBE_READ_REG(hw, IXGBE_FCTRL);
	reg_val |= IXGBE_FCTRL_BAM;	/* broadcast accept mode */
	reg_val |= IXGBE_FCTRL_DPF;	/* discard pause frames */
	IXGBE_WRITE_REG(hw, IXGBE_FCTRL, reg_val);

	/*
	 * Enable the receive unit.  This must be done after filter
	 * control is set in FCTRL.
	 */
	reg_val = (IXGBE_RXCTRL_RXEN	/* Enable Receive Unit */
	    | IXGBE_RXCTRL_DMBYPS);	/* descriptor monitor bypass */
	IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, reg_val);

	/*
	 * ixgbe_setup_rx_ring must be called after configuring RXCTRL
	 */
	for (i = 0; i < ixgbe->num_rx_rings; i++) {
		rx_ring = &ixgbe->rx_rings[i];
		ixgbe_setup_rx_ring(rx_ring);
	}

	/*
	 * Setup rx groups.
	 */
	for (i = 0; i < ixgbe->num_rx_groups; i++) {
		rx_group = &ixgbe->rx_groups[i];
		rx_group->index = i;
		rx_group->ixgbe = ixgbe;
	}

	/*
	 * Setup the per-ring statistics mapping.
	 */
	ring_mapping = 0;
	for (i = 0; i < ixgbe->num_rx_rings; i++) {
		ring_mapping |= (i & 0xF) << (8 * (i & 0x3));
		if ((i & 0x3) == 0x3) {
			IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i >> 2), ring_mapping);
			ring_mapping = 0;
		}
	}
	if ((i & 0x3) != 0x3)
		IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i >> 2), ring_mapping);

	/*
	 * The Max Frame Size in MHADD/MAXFRS will be internally increased
	 * by four bytes if the packet has a VLAN field, so includes MTU,
	 * ethernet header and frame check sequence.
	 * Register is MAXFRS in 82599.
	 */
	reg_val = (ixgbe->default_mtu + sizeof (struct ether_header)
	    + ETHERFCSL) << IXGBE_MHADD_MFS_SHIFT;
	IXGBE_WRITE_REG(hw, IXGBE_MHADD, reg_val);

	/*
	 * Setup Jumbo Frame enable bit
	 */
	if (ixgbe->default_mtu > ETHERMTU) {
		reg_val = IXGBE_READ_REG(hw, IXGBE_HLREG0);
		reg_val |= IXGBE_HLREG0_JUMBOEN;
		IXGBE_WRITE_REG(hw, IXGBE_HLREG0, reg_val);
	}

	/*
	 * Hardware checksum settings
	 */
	if (ixgbe->rx_hcksum_enable) {
		reg_val = IXGBE_RXCSUM_IPPCSE;	/* IP checksum */
		IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, reg_val);
	}

	/*
	 * Setup RSS for multiple receive queues
	 */
	if (ixgbe->num_rx_rings > 1)
		ixgbe_setup_rss(ixgbe);
}

static void
ixgbe_setup_tx_ring(ixgbe_tx_ring_t *tx_ring)
{
	ixgbe_t *ixgbe = tx_ring->ixgbe;
	struct ixgbe_hw *hw = &ixgbe->hw;
	uint32_t size;
	uint32_t buf_low;
	uint32_t buf_high;
	uint32_t reg_val;

	ASSERT(mutex_owned(&tx_ring->tx_lock));
	ASSERT(mutex_owned(&ixgbe->gen_lock));

	/*
	 * Initialize the length register
	 */
	size = tx_ring->ring_size * sizeof (union ixgbe_adv_tx_desc);
	IXGBE_WRITE_REG(hw, IXGBE_TDLEN(tx_ring->index), size);

	/*
	 * Initialize the base address registers
	 */
	buf_low = (uint32_t)tx_ring->tbd_area.dma_address;
	buf_high = (uint32_t)(tx_ring->tbd_area.dma_address >> 32);
	IXGBE_WRITE_REG(hw, IXGBE_TDBAL(tx_ring->index), buf_low);
	IXGBE_WRITE_REG(hw, IXGBE_TDBAH(tx_ring->index), buf_high);

	/*
	 * Setup head & tail pointers
	 */
	IXGBE_WRITE_REG(hw, IXGBE_TDH(tx_ring->index), 0);
	IXGBE_WRITE_REG(hw, IXGBE_TDT(tx_ring->index), 0);

	/*
	 * Setup head write-back
	 */
	if (ixgbe->tx_head_wb_enable) {
		/*
		 * The memory of the head write-back is allocated using
		 * the extra tbd beyond the tail of the tbd ring.
		 */
		tx_ring->tbd_head_wb = (uint32_t *)
		    ((uintptr_t)tx_ring->tbd_area.address + size);
		*tx_ring->tbd_head_wb = 0;

		buf_low = (uint32_t)
		    (tx_ring->tbd_area.dma_address + size);
		buf_high = (uint32_t)
		    ((tx_ring->tbd_area.dma_address + size) >> 32);

		/* Set the head write-back enable bit */
		buf_low |= IXGBE_TDWBAL_HEAD_WB_ENABLE;

		IXGBE_WRITE_REG(hw, IXGBE_TDWBAL(tx_ring->index), buf_low);
		IXGBE_WRITE_REG(hw, IXGBE_TDWBAH(tx_ring->index), buf_high);

		/*
		 * Turn off relaxed ordering for head write back or it will
		 * cause problems with the tx recycling
		 */
		reg_val = IXGBE_READ_REG(hw,
		    IXGBE_DCA_TXCTRL(tx_ring->index));
		reg_val &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
		IXGBE_WRITE_REG(hw,
		    IXGBE_DCA_TXCTRL(tx_ring->index), reg_val);
	} else {
		tx_ring->tbd_head_wb = NULL;
	}

	tx_ring->tbd_head = 0;
	tx_ring->tbd_tail = 0;
	tx_ring->tbd_free = tx_ring->ring_size;

	/*
	 * Note: Considering the case that the chipset is being reset,
	 * and there are still some tcb in the pending list,
	 * we should not reset the values of tcb_head, tcb_tail and
	 * tcb_free if the state is not IXGBE_UNKNOWN.
	 */
	if (ixgbe->ixgbe_state == IXGBE_UNKNOWN) {
		tx_ring->tcb_head = 0;
		tx_ring->tcb_tail = 0;
		tx_ring->tcb_free = tx_ring->free_list_size;
	}

	/*
	 * Initialize the s/w context structure
	 */
	bzero(&tx_ring->tx_context, sizeof (ixgbe_tx_context_t));
}

static void
ixgbe_setup_tx(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	ixgbe_tx_ring_t *tx_ring;
	uint32_t reg_val;
	uint32_t ring_mapping;
	int i;

	for (i = 0; i < ixgbe->num_tx_rings; i++) {
		tx_ring = &ixgbe->tx_rings[i];
		ixgbe_setup_tx_ring(tx_ring);
	}

	/*
	 * Setup the per-ring statistics mapping.
	 */
	ring_mapping = 0;
	for (i = 0; i < ixgbe->num_tx_rings; i++) {
		ring_mapping |= (i & 0xF) << (8 * (i & 0x3));
		if ((i & 0x3) == 0x3) {
			if (hw->mac.type >= ixgbe_mac_82599EB) {
				IXGBE_WRITE_REG(hw, IXGBE_TQSM(i >> 2),
				    ring_mapping);
			} else {
				IXGBE_WRITE_REG(hw, IXGBE_TQSMR(i >> 2),
				    ring_mapping);
			}
			ring_mapping = 0;
		}
	}
	if ((i & 0x3) != 0x3)
		if (hw->mac.type >= ixgbe_mac_82599EB) {
			IXGBE_WRITE_REG(hw, IXGBE_TQSM(i >> 2), ring_mapping);
		} else {
			IXGBE_WRITE_REG(hw, IXGBE_TQSMR(i >> 2), ring_mapping);
		}

	/*
	 * Enable CRC appending and TX padding (for short tx frames)
	 */
	reg_val = IXGBE_READ_REG(hw, IXGBE_HLREG0);
	reg_val |= IXGBE_HLREG0_TXCRCEN | IXGBE_HLREG0_TXPADEN;
	IXGBE_WRITE_REG(hw, IXGBE_HLREG0, reg_val);

	/*
	 * enable DMA for 82599 parts
	 */
	if (hw->mac.type == ixgbe_mac_82599EB) {
	/* DMATXCTL.TE must be set after all Tx config is complete */
		reg_val = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
		reg_val |= IXGBE_DMATXCTL_TE;
		IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, reg_val);
	}

	/*
	 * Enabling tx queues ..
	 * For 82599 must be done after DMATXCTL.TE is set
	 */
	for (i = 0; i < ixgbe->num_tx_rings; i++) {
		tx_ring = &ixgbe->tx_rings[i];
		reg_val = IXGBE_READ_REG(hw, IXGBE_TXDCTL(tx_ring->index));
		reg_val |= IXGBE_TXDCTL_ENABLE;
		IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(tx_ring->index), reg_val);
	}
}

/*
 * ixgbe_setup_rss - Setup receive-side scaling feature.
 */
static void
ixgbe_setup_rss(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	uint32_t i, mrqc, rxcsum;
	uint32_t random;
	uint32_t reta;

	/*
	 * Fill out redirection table
	 */
	reta = 0;
	for (i = 0; i < 128; i++) {
		reta = (reta << 8) | (i % ixgbe->num_rx_rings);
		if ((i & 3) == 3)
			IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
	}

	/*
	 * Fill out hash function seeds with a random constant
	 */
	for (i = 0; i < 10; i++) {
		(void) random_get_pseudo_bytes((uint8_t *)&random,
		    sizeof (uint32_t));
		IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), random);
	}

	/*
	 * Enable RSS & perform hash on these packet types
	 */
	mrqc = IXGBE_MRQC_RSSEN |
	    IXGBE_MRQC_RSS_FIELD_IPV4 |
	    IXGBE_MRQC_RSS_FIELD_IPV4_TCP |
	    IXGBE_MRQC_RSS_FIELD_IPV4_UDP |
	    IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP |
	    IXGBE_MRQC_RSS_FIELD_IPV6_EX |
	    IXGBE_MRQC_RSS_FIELD_IPV6 |
	    IXGBE_MRQC_RSS_FIELD_IPV6_TCP |
	    IXGBE_MRQC_RSS_FIELD_IPV6_UDP |
	    IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP;
	IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);

	/*
	 * Disable Packet Checksum to enable RSS for multiple receive queues.
	 * It is an adapter hardware limitation that Packet Checksum is
	 * mutually exclusive with RSS.
	 */
	rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
	rxcsum |= IXGBE_RXCSUM_PCSD;
	rxcsum &= ~IXGBE_RXCSUM_IPPCSE;
	IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
}

/*
 * ixgbe_init_unicst - Initialize the unicast addresses.
 */
static void
ixgbe_init_unicst(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	uint8_t *mac_addr;
	int slot;
	/*
	 * Here we should consider two situations:
	 *
	 * 1. Chipset is initialized at the first time,
	 *    Clear all the multiple unicast addresses.
	 *
	 * 2. Chipset is reset
	 *    Recover the multiple unicast addresses from the
	 *    software data structure to the RAR registers.
	 */
	if (!ixgbe->unicst_init) {
		/*
		 * Initialize the multiple unicast addresses
		 */
		ixgbe->unicst_total = MAX_NUM_UNICAST_ADDRESSES;
		ixgbe->unicst_avail = ixgbe->unicst_total;
		for (slot = 0; slot < ixgbe->unicst_total; slot++) {
			mac_addr = ixgbe->unicst_addr[slot].mac.addr;
			bzero(mac_addr, ETHERADDRL);
			(void) ixgbe_set_rar(hw, slot, mac_addr, NULL, NULL);
			ixgbe->unicst_addr[slot].mac.set = 0;
		}
		ixgbe->unicst_init = B_TRUE;
	} else {
		/* Re-configure the RAR registers */
		for (slot = 0; slot < ixgbe->unicst_total; slot++) {
			mac_addr = ixgbe->unicst_addr[slot].mac.addr;
			if (ixgbe->unicst_addr[slot].mac.set == 1) {
				(void) ixgbe_set_rar(hw, slot, mac_addr,
				    NULL, IXGBE_RAH_AV);
			} else {
				bzero(mac_addr, ETHERADDRL);
				(void) ixgbe_set_rar(hw, slot, mac_addr,
				    NULL, NULL);
			}
		}
	}
}

/*
 * ixgbe_unicst_set - Set the unicast address to the specified slot.
 */
int
ixgbe_unicst_set(ixgbe_t *ixgbe, const uint8_t *mac_addr,
    int slot)
{
	struct ixgbe_hw *hw = &ixgbe->hw;

	ASSERT(mutex_owned(&ixgbe->gen_lock));

	/*
	 * Save the unicast address in the software data structure
	 */
	bcopy(mac_addr, ixgbe->unicst_addr[slot].mac.addr, ETHERADDRL);

	/*
	 * Set the unicast address to the RAR register
	 */
	(void) ixgbe_set_rar(hw, slot, (uint8_t *)mac_addr, NULL, IXGBE_RAH_AV);

	if (ixgbe_check_acc_handle(ixgbe->osdep.reg_handle) != DDI_FM_OK) {
		ddi_fm_service_impact(ixgbe->dip, DDI_SERVICE_DEGRADED);
		return (EIO);
	}

	return (0);
}

/*
 * ixgbe_unicst_find - Find the slot for the specified unicast address
 */
int
ixgbe_unicst_find(ixgbe_t *ixgbe, const uint8_t *mac_addr)
{
	int slot;

	ASSERT(mutex_owned(&ixgbe->gen_lock));

	for (slot = 0; slot < ixgbe->unicst_total; slot++) {
		if (bcmp(ixgbe->unicst_addr[slot].mac.addr,
		    mac_addr, ETHERADDRL) == 0)
			return (slot);
	}

	return (-1);
}

/*
 * ixgbe_multicst_add - Add a multicst address.
 */
int
ixgbe_multicst_add(ixgbe_t *ixgbe, const uint8_t *multiaddr)
{
	ASSERT(mutex_owned(&ixgbe->gen_lock));

	if ((multiaddr[0] & 01) == 0) {
		return (EINVAL);
	}

	if (ixgbe->mcast_count >= MAX_NUM_MULTICAST_ADDRESSES) {
		return (ENOENT);
	}

	bcopy(multiaddr,
	    &ixgbe->mcast_table[ixgbe->mcast_count], ETHERADDRL);
	ixgbe->mcast_count++;

	/*
	 * Update the multicast table in the hardware
	 */
	ixgbe_setup_multicst(ixgbe);

	if (ixgbe_check_acc_handle(ixgbe->osdep.reg_handle) != DDI_FM_OK) {
		ddi_fm_service_impact(ixgbe->dip, DDI_SERVICE_DEGRADED);
		return (EIO);
	}

	return (0);
}

/*
 * ixgbe_multicst_remove - Remove a multicst address.
 */
int
ixgbe_multicst_remove(ixgbe_t *ixgbe, const uint8_t *multiaddr)
{
	int i;

	ASSERT(mutex_owned(&ixgbe->gen_lock));

	for (i = 0; i < ixgbe->mcast_count; i++) {
		if (bcmp(multiaddr, &ixgbe->mcast_table[i],
		    ETHERADDRL) == 0) {
			for (i++; i < ixgbe->mcast_count; i++) {
				ixgbe->mcast_table[i - 1] =
				    ixgbe->mcast_table[i];
			}
			ixgbe->mcast_count--;
			break;
		}
	}

	/*
	 * Update the multicast table in the hardware
	 */
	ixgbe_setup_multicst(ixgbe);

	if (ixgbe_check_acc_handle(ixgbe->osdep.reg_handle) != DDI_FM_OK) {
		ddi_fm_service_impact(ixgbe->dip, DDI_SERVICE_DEGRADED);
		return (EIO);
	}

	return (0);
}

/*
 * ixgbe_setup_multicast - Setup multicast data structures.
 *
 * This routine initializes all of the multicast related structures
 * and save them in the hardware registers.
 */
static void
ixgbe_setup_multicst(ixgbe_t *ixgbe)
{
	uint8_t *mc_addr_list;
	uint32_t mc_addr_count;
	struct ixgbe_hw *hw = &ixgbe->hw;

	ASSERT(mutex_owned(&ixgbe->gen_lock));

	ASSERT(ixgbe->mcast_count <= MAX_NUM_MULTICAST_ADDRESSES);

	mc_addr_list = (uint8_t *)ixgbe->mcast_table;
	mc_addr_count = ixgbe->mcast_count;

	/*
	 * Update the multicast addresses to the MTA registers
	 */
	(void) ixgbe_update_mc_addr_list(hw, mc_addr_list, mc_addr_count,
	    ixgbe_mc_table_itr);
}

/*
 * ixgbe_get_conf - Get driver configurations set in driver.conf.
 *
 * This routine gets user-configured values out of the configuration
 * file ixgbe.conf.
 *
 * For each configurable value, there is a minimum, a maximum, and a
 * default.
 * If user does not configure a value, use the default.
 * If user configures below the minimum, use the minumum.
 * If user configures above the maximum, use the maxumum.
 */
static void
ixgbe_get_conf(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	uint32_t flow_control;

	/*
	 * ixgbe driver supports the following user configurations:
	 *
	 * Jumbo frame configuration:
	 *    default_mtu
	 *
	 * Ethernet flow control configuration:
	 *    flow_control
	 *
	 * Multiple rings configurations:
	 *    tx_queue_number
	 *    tx_ring_size
	 *    rx_queue_number
	 *    rx_ring_size
	 *
	 * Call ixgbe_get_prop() to get the value for a specific
	 * configuration parameter.
	 */

	/*
	 * Jumbo frame configuration - max_frame_size controls host buffer
	 * allocation, so includes MTU, ethernet header, vlan tag and
	 * frame check sequence.
	 */
	ixgbe->default_mtu = ixgbe_get_prop(ixgbe, PROP_DEFAULT_MTU,
	    MIN_MTU, MAX_MTU, DEFAULT_MTU);

	ixgbe->max_frame_size = ixgbe->default_mtu +
	    sizeof (struct ether_vlan_header) + ETHERFCSL;

	/*
	 * Ethernet flow control configuration
	 */
	flow_control = ixgbe_get_prop(ixgbe, PROP_FLOW_CONTROL,
	    ixgbe_fc_none, 3, ixgbe_fc_none);
	if (flow_control == 3)
		flow_control = ixgbe_fc_default;

	/*
	 * fc.requested mode is what the user requests.  After autoneg,
	 * fc.current_mode will be the flow_control mode that was negotiated.
	 */
	hw->fc.requested_mode = flow_control;

	/*
	 * Multiple rings configurations
	 */
	ixgbe->num_tx_rings = ixgbe_get_prop(ixgbe, PROP_TX_QUEUE_NUM,
	    ixgbe->capab->min_tx_que_num,
	    ixgbe->capab->max_tx_que_num,
	    ixgbe->capab->def_tx_que_num);
	ixgbe->tx_ring_size = ixgbe_get_prop(ixgbe, PROP_TX_RING_SIZE,
	    MIN_TX_RING_SIZE, MAX_TX_RING_SIZE, DEFAULT_TX_RING_SIZE);

	ixgbe->num_rx_rings = ixgbe_get_prop(ixgbe, PROP_RX_QUEUE_NUM,
	    ixgbe->capab->min_rx_que_num,
	    ixgbe->capab->max_rx_que_num,
	    ixgbe->capab->def_rx_que_num);
	ixgbe->rx_ring_size = ixgbe_get_prop(ixgbe, PROP_RX_RING_SIZE,
	    MIN_RX_RING_SIZE, MAX_RX_RING_SIZE, DEFAULT_RX_RING_SIZE);

	/*
	 * Multiple groups configuration
	 */
	ixgbe->num_rx_groups = ixgbe_get_prop(ixgbe, PROP_RX_GROUP_NUM,
	    MIN_RX_GROUP_NUM, MAX_RX_GROUP_NUM, DEFAULT_RX_GROUP_NUM);

	ixgbe->mr_enable = ixgbe_get_prop(ixgbe, PROP_MR_ENABLE,
	    0, 1, DEFAULT_MR_ENABLE);

	if (ixgbe->mr_enable == B_FALSE) {
		ixgbe->num_tx_rings = 1;
		ixgbe->num_rx_rings = 1;
		ixgbe->num_rx_groups = 1;
	}

	/*
	 * Tunable used to force an interrupt type. The only use is
	 * for testing of the lesser interrupt types.
	 * 0 = don't force interrupt type
	 * 1 = force interrupt type MSI-X
	 * 2 = force interrupt type MSI
	 * 3 = force interrupt type Legacy
	 */
	ixgbe->intr_force = ixgbe_get_prop(ixgbe, PROP_INTR_FORCE,
	    IXGBE_INTR_NONE, IXGBE_INTR_LEGACY, IXGBE_INTR_NONE);

	ixgbe->tx_hcksum_enable = ixgbe_get_prop(ixgbe, PROP_TX_HCKSUM_ENABLE,
	    0, 1, DEFAULT_TX_HCKSUM_ENABLE);
	ixgbe->rx_hcksum_enable = ixgbe_get_prop(ixgbe, PROP_RX_HCKSUM_ENABLE,
	    0, 1, DEFAULT_RX_HCKSUM_ENABLE);
	ixgbe->lso_enable = ixgbe_get_prop(ixgbe, PROP_LSO_ENABLE,
	    0, 1, DEFAULT_LSO_ENABLE);
	ixgbe->tx_head_wb_enable = ixgbe_get_prop(ixgbe, PROP_TX_HEAD_WB_ENABLE,
	    0, 1, DEFAULT_TX_HEAD_WB_ENABLE);

	/* Head Write Back not recommended for 82599 */
	if (hw->mac.type >= ixgbe_mac_82599EB) {
		ixgbe->tx_head_wb_enable = B_FALSE;
	}

	/*
	 * ixgbe LSO needs the tx h/w checksum support.
	 * LSO will be disabled if tx h/w checksum is not
	 * enabled.
	 */
	if (ixgbe->tx_hcksum_enable == B_FALSE) {
		ixgbe->lso_enable = B_FALSE;
	}

	ixgbe->tx_copy_thresh = ixgbe_get_prop(ixgbe, PROP_TX_COPY_THRESHOLD,
	    MIN_TX_COPY_THRESHOLD, MAX_TX_COPY_THRESHOLD,
	    DEFAULT_TX_COPY_THRESHOLD);
	ixgbe->tx_recycle_thresh = ixgbe_get_prop(ixgbe,
	    PROP_TX_RECYCLE_THRESHOLD, MIN_TX_RECYCLE_THRESHOLD,
	    MAX_TX_RECYCLE_THRESHOLD, DEFAULT_TX_RECYCLE_THRESHOLD);
	ixgbe->tx_overload_thresh = ixgbe_get_prop(ixgbe,
	    PROP_TX_OVERLOAD_THRESHOLD, MIN_TX_OVERLOAD_THRESHOLD,
	    MAX_TX_OVERLOAD_THRESHOLD, DEFAULT_TX_OVERLOAD_THRESHOLD);
	ixgbe->tx_resched_thresh = ixgbe_get_prop(ixgbe,
	    PROP_TX_RESCHED_THRESHOLD, MIN_TX_RESCHED_THRESHOLD,
	    MAX_TX_RESCHED_THRESHOLD, DEFAULT_TX_RESCHED_THRESHOLD);

	ixgbe->rx_copy_thresh = ixgbe_get_prop(ixgbe, PROP_RX_COPY_THRESHOLD,
	    MIN_RX_COPY_THRESHOLD, MAX_RX_COPY_THRESHOLD,
	    DEFAULT_RX_COPY_THRESHOLD);
	ixgbe->rx_limit_per_intr = ixgbe_get_prop(ixgbe, PROP_RX_LIMIT_PER_INTR,
	    MIN_RX_LIMIT_PER_INTR, MAX_RX_LIMIT_PER_INTR,
	    DEFAULT_RX_LIMIT_PER_INTR);

	/*
	 * Interrupt throttling is per 256ns in 82598 and 2.048usec
	 * (256ns * 8) increments in 82599.
	 */
	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		ixgbe->intr_throttling[0] = ixgbe_get_prop(ixgbe,
		    PROP_INTR_THROTTLING,
		    MIN_INTR_THROTTLING, MAX_INTR_THROTTLING_82598,
		    DEFAULT_INTR_THROTTLING_82598);
		break;
	case ixgbe_mac_82599EB:
		ixgbe->intr_throttling[0] = ixgbe_get_prop(ixgbe,
		    PROP_INTR_THROTTLING,
		    MIN_INTR_THROTTLING, MAX_INTR_THROTTLING_82599,
		    DEFAULT_INTR_THROTTLING_82599);

		/*
		 * 82599 requires the interupt throttling rate is
		 * a multiple of 8. This is enforced by the register
		 * definiton.
		 */
		ixgbe->intr_throttling[0] = ixgbe->intr_throttling[0] &
		    0xFF8;
		break;
	}
}

/*
 * ixgbe_get_prop - Get a property value out of the configuration file
 * ixgbe.conf.
 *
 * Caller provides the name of the property, a default value, a minimum
 * value, and a maximum value.
 *
 * Return configured value of the property, with default, minimum and
 * maximum properly applied.
 */
static int
ixgbe_get_prop(ixgbe_t *ixgbe,
    char *propname,	/* name of the property */
    int minval,		/* minimum acceptable value */
    int maxval,		/* maximim acceptable value */
    int defval)		/* default value */
{
	int value;

	/*
	 * Call ddi_prop_get_int() to read the conf settings
	 */
	value = ddi_prop_get_int(DDI_DEV_T_ANY, ixgbe->dip,
	    DDI_PROP_DONTPASS, propname, defval);
	if (value > maxval)
		value = maxval;

	if (value < minval)
		value = minval;

	return (value);
}

/*
 * ixgbe_driver_setup_link - Using the link properties to setup the link.
 */
int
ixgbe_driver_setup_link(ixgbe_t *ixgbe, boolean_t setup_hw)
{
	struct ixgbe_mac_info *mac;
	struct ixgbe_phy_info *phy;
	boolean_t invalid;

	mac = &ixgbe->hw.mac;
	phy = &ixgbe->hw.phy;
	invalid = B_FALSE;

	if (ixgbe->param_adv_autoneg_cap == 1) {
		mac->autoneg = B_TRUE;
		phy->autoneg_advertised = 0;

		/*
		 * No half duplex support with 10Gb parts
		 */
		if (ixgbe->param_adv_10000fdx_cap == 1)
			phy->autoneg_advertised |= IXGBE_LINK_SPEED_10GB_FULL;

		if (ixgbe->param_adv_1000fdx_cap == 1)
			phy->autoneg_advertised |= IXGBE_LINK_SPEED_1GB_FULL;

		if (ixgbe->param_adv_100fdx_cap == 1)
			phy->autoneg_advertised |= IXGBE_LINK_SPEED_100_FULL;

		if (phy->autoneg_advertised == 0)
			invalid = B_TRUE;
	} else {
		ixgbe->hw.mac.autoneg = B_FALSE;
	}

	if (invalid) {
		ixgbe_notice(ixgbe, "Invalid link settings. Setup link to "
		    "autonegotiation with full link capabilities.");
		ixgbe->hw.mac.autoneg = B_TRUE;
	}

	if (setup_hw) {
		if (ixgbe_setup_link(&ixgbe->hw) != IXGBE_SUCCESS) {
			ixgbe_notice(ixgbe, "Setup link failed on this "
			    "device.");
			return (IXGBE_FAILURE);
		}
	}

	return (IXGBE_SUCCESS);
}

/*
 * ixgbe_driver_link_check - Link status processing done in taskq.
 */
static void
ixgbe_driver_link_check(void *arg)
{
	ixgbe_t *ixgbe = (ixgbe_t *)arg;
	struct ixgbe_hw *hw = &ixgbe->hw;
	ixgbe_link_speed speed = IXGBE_LINK_SPEED_UNKNOWN;
	boolean_t link_up = B_FALSE;
	boolean_t link_changed = B_FALSE;

	mutex_enter(&ixgbe->gen_lock);

	/* check for link, wait the full time */
	(void) ixgbe_check_link(hw, &speed, &link_up, true);
	if (link_up) {
		/* Link is up, enable flow control settings */
		(void) ixgbe_fc_enable(hw, 0);

		/*
		 * The Link is up, check whether it was marked as down earlier
		 */
		if (ixgbe->link_state != LINK_STATE_UP) {
			switch (speed) {
			case IXGBE_LINK_SPEED_10GB_FULL:
				ixgbe->link_speed = SPEED_10GB;
				break;
			case IXGBE_LINK_SPEED_1GB_FULL:
				ixgbe->link_speed = SPEED_1GB;
				break;
			case IXGBE_LINK_SPEED_100_FULL:
				ixgbe->link_speed = SPEED_100;
			}
			ixgbe->link_duplex = LINK_DUPLEX_FULL;
			ixgbe->link_state = LINK_STATE_UP;
			ixgbe->link_down_timeout = 0;
			link_changed = B_TRUE;
		}
	} else {
		if (ixgbe->link_state != LINK_STATE_DOWN) {
			ixgbe->link_speed = 0;
			ixgbe->link_duplex = 0;
			ixgbe->link_state = LINK_STATE_DOWN;
			link_changed = B_TRUE;
		}

		if (ixgbe->ixgbe_state & IXGBE_STARTED) {
			if (ixgbe->link_down_timeout < MAX_LINK_DOWN_TIMEOUT) {
				ixgbe->link_down_timeout++;
			} else if (ixgbe->link_down_timeout ==
			    MAX_LINK_DOWN_TIMEOUT) {
				ixgbe_tx_clean(ixgbe);
				ixgbe->link_down_timeout++;
			}
		}
	}

	/*
	 * this is only reached after a link-status-change interrupt
	 * so always get new phy state
	 */
	ixgbe_get_hw_state(ixgbe);

	/* re-enable the interrupt, which was automasked */
	ixgbe->eims |= IXGBE_EICR_LSC;
	IXGBE_WRITE_REG(hw, IXGBE_EIMS, ixgbe->eims);

	mutex_exit(&ixgbe->gen_lock);

	/* outside the gen_lock */
	if (link_changed) {
		mac_link_update(ixgbe->mac_hdl, ixgbe->link_state);
	}
}

/*
 * ixgbe_sfp_check - sfp module processing done in taskq only for 82599.
 */
static void
ixgbe_sfp_check(void *arg)
{
	ixgbe_t *ixgbe = (ixgbe_t *)arg;
	uint32_t eicr = ixgbe->eicr;
	struct ixgbe_hw *hw = &ixgbe->hw;
	uint32_t autoneg;

	if (eicr & IXGBE_EICR_GPI_SDP1) {
		/* clear the interrupt */
		IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);

		/* if link up, do multispeed fiber setup */
		(void) ixgbe_get_link_capabilities(hw, &autoneg,
		    &hw->mac.autoneg);
		(void) ixgbe_setup_link_speed(hw, autoneg, B_TRUE, B_TRUE);
		ixgbe_driver_link_check(ixgbe);
	} else if (eicr & IXGBE_EICR_GPI_SDP2) {
		/* clear the interrupt */
		IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);

		/* if link up, do sfp module setup */
		(void) hw->mac.ops.setup_sfp(hw);

		/* do multispeed fiber setup */
		(void) ixgbe_get_link_capabilities(hw, &autoneg,
		    &hw->mac.autoneg);
		(void) ixgbe_setup_link_speed(hw, autoneg, B_TRUE, B_TRUE);
		ixgbe_driver_link_check(ixgbe);
	}
}

/*
 * ixgbe_local_timer - Driver watchdog function.
 *
 * This function will handle the transmit stall check, link status check and
 * other routines.
 */
static void
ixgbe_local_timer(void *arg)
{
	ixgbe_t *ixgbe = (ixgbe_t *)arg;

	if (ixgbe_stall_check(ixgbe)) {
		ddi_fm_service_impact(ixgbe->dip, DDI_SERVICE_DEGRADED);
		ixgbe->reset_count++;
		if (ixgbe_reset(ixgbe) == IXGBE_SUCCESS)
			ddi_fm_service_impact(ixgbe->dip, DDI_SERVICE_RESTORED);
	}

	ixgbe_restart_watchdog_timer(ixgbe);
}

/*
 * ixgbe_stall_check - Check for transmit stall.
 *
 * This function checks if the adapter is stalled (in transmit).
 *
 * It is called each time the watchdog timeout is invoked.
 * If the transmit descriptor reclaim continuously fails,
 * the watchdog value will increment by 1. If the watchdog
 * value exceeds the threshold, the ixgbe is assumed to
 * have stalled and need to be reset.
 */
static boolean_t
ixgbe_stall_check(ixgbe_t *ixgbe)
{
	ixgbe_tx_ring_t *tx_ring;
	boolean_t result;
	int i;

	if (ixgbe->link_state != LINK_STATE_UP)
		return (B_FALSE);

	/*
	 * If any tx ring is stalled, we'll reset the chipset
	 */
	result = B_FALSE;
	for (i = 0; i < ixgbe->num_tx_rings; i++) {
		tx_ring = &ixgbe->tx_rings[i];
		if (tx_ring->tbd_free <= tx_ring->recycle_thresh) {
			tx_ring->tx_recycle(tx_ring);
		}

		if (tx_ring->recycle_fail > 0)
			tx_ring->stall_watchdog++;
		else
			tx_ring->stall_watchdog = 0;

		if (tx_ring->stall_watchdog >= STALL_WATCHDOG_TIMEOUT) {
			result = B_TRUE;
			break;
		}
	}

	if (result) {
		tx_ring->stall_watchdog = 0;
		tx_ring->recycle_fail = 0;
	}

	return (result);
}


/*
 * is_valid_mac_addr - Check if the mac address is valid.
 */
static boolean_t
is_valid_mac_addr(uint8_t *mac_addr)
{
	const uint8_t addr_test1[6] = { 0, 0, 0, 0, 0, 0 };
	const uint8_t addr_test2[6] =
	    { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };

	if (!(bcmp(addr_test1, mac_addr, ETHERADDRL)) ||
	    !(bcmp(addr_test2, mac_addr, ETHERADDRL)))
		return (B_FALSE);

	return (B_TRUE);
}

static boolean_t
ixgbe_find_mac_address(ixgbe_t *ixgbe)
{
#ifdef __sparc
	struct ixgbe_hw *hw = &ixgbe->hw;
	uchar_t *bytes;
	struct ether_addr sysaddr;
	uint_t nelts;
	int err;
	boolean_t found = B_FALSE;

	/*
	 * The "vendor's factory-set address" may already have
	 * been extracted from the chip, but if the property
	 * "local-mac-address" is set we use that instead.
	 *
	 * We check whether it looks like an array of 6
	 * bytes (which it should, if OBP set it).  If we can't
	 * make sense of it this way, we'll ignore it.
	 */
	err = ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, ixgbe->dip,
	    DDI_PROP_DONTPASS, "local-mac-address", &bytes, &nelts);
	if (err == DDI_PROP_SUCCESS) {
		if (nelts == ETHERADDRL) {
			while (nelts--)
				hw->mac.addr[nelts] = bytes[nelts];
			found = B_TRUE;
		}
		ddi_prop_free(bytes);
	}

	/*
	 * Look up the OBP property "local-mac-address?". If the user has set
	 * 'local-mac-address? = false', use "the system address" instead.
	 */
	if (ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, ixgbe->dip, 0,
	    "local-mac-address?", &bytes, &nelts) == DDI_PROP_SUCCESS) {
		if (strncmp("false", (caddr_t)bytes, (size_t)nelts) == 0) {
			if (localetheraddr(NULL, &sysaddr) != 0) {
				bcopy(&sysaddr, hw->mac.addr, ETHERADDRL);
				found = B_TRUE;
			}
		}
		ddi_prop_free(bytes);
	}

	/*
	 * Finally(!), if there's a valid "mac-address" property (created
	 * if we netbooted from this interface), we must use this instead
	 * of any of the above to ensure that the NFS/install server doesn't
	 * get confused by the address changing as Solaris takes over!
	 */
	err = ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, ixgbe->dip,
	    DDI_PROP_DONTPASS, "mac-address", &bytes, &nelts);
	if (err == DDI_PROP_SUCCESS) {
		if (nelts == ETHERADDRL) {
			while (nelts--)
				hw->mac.addr[nelts] = bytes[nelts];
			found = B_TRUE;
		}
		ddi_prop_free(bytes);
	}

	if (found) {
		bcopy(hw->mac.addr, hw->mac.perm_addr, ETHERADDRL);
		return (B_TRUE);
	}
#else
	_NOTE(ARGUNUSED(ixgbe));
#endif

	return (B_TRUE);
}

#pragma inline(ixgbe_arm_watchdog_timer)
static void
ixgbe_arm_watchdog_timer(ixgbe_t *ixgbe)
{
	/*
	 * Fire a watchdog timer
	 */
	ixgbe->watchdog_tid =
	    timeout(ixgbe_local_timer,
	    (void *)ixgbe, 1 * drv_usectohz(1000000));

}

/*
 * ixgbe_enable_watchdog_timer - Enable and start the driver watchdog timer.
 */
void
ixgbe_enable_watchdog_timer(ixgbe_t *ixgbe)
{
	mutex_enter(&ixgbe->watchdog_lock);

	if (!ixgbe->watchdog_enable) {
		ixgbe->watchdog_enable = B_TRUE;
		ixgbe->watchdog_start = B_TRUE;
		ixgbe_arm_watchdog_timer(ixgbe);
	}

	mutex_exit(&ixgbe->watchdog_lock);
}

/*
 * ixgbe_disable_watchdog_timer - Disable and stop the driver watchdog timer.
 */
void
ixgbe_disable_watchdog_timer(ixgbe_t *ixgbe)
{
	timeout_id_t tid;

	mutex_enter(&ixgbe->watchdog_lock);

	ixgbe->watchdog_enable = B_FALSE;
	ixgbe->watchdog_start = B_FALSE;
	tid = ixgbe->watchdog_tid;
	ixgbe->watchdog_tid = 0;

	mutex_exit(&ixgbe->watchdog_lock);

	if (tid != 0)
		(void) untimeout(tid);
}

/*
 * ixgbe_start_watchdog_timer - Start the driver watchdog timer.
 */
void
ixgbe_start_watchdog_timer(ixgbe_t *ixgbe)
{
	mutex_enter(&ixgbe->watchdog_lock);

	if (ixgbe->watchdog_enable) {
		if (!ixgbe->watchdog_start) {
			ixgbe->watchdog_start = B_TRUE;
			ixgbe_arm_watchdog_timer(ixgbe);
		}
	}

	mutex_exit(&ixgbe->watchdog_lock);
}

/*
 * ixgbe_restart_watchdog_timer - Restart the driver watchdog timer.
 */
static void
ixgbe_restart_watchdog_timer(ixgbe_t *ixgbe)
{
	mutex_enter(&ixgbe->watchdog_lock);

	if (ixgbe->watchdog_start)
		ixgbe_arm_watchdog_timer(ixgbe);

	mutex_exit(&ixgbe->watchdog_lock);
}

/*
 * ixgbe_stop_watchdog_timer - Stop the driver watchdog timer.
 */
void
ixgbe_stop_watchdog_timer(ixgbe_t *ixgbe)
{
	timeout_id_t tid;

	mutex_enter(&ixgbe->watchdog_lock);

	ixgbe->watchdog_start = B_FALSE;
	tid = ixgbe->watchdog_tid;
	ixgbe->watchdog_tid = 0;

	mutex_exit(&ixgbe->watchdog_lock);

	if (tid != 0)
		(void) untimeout(tid);
}

/*
 * ixgbe_disable_adapter_interrupts - Disable all adapter interrupts.
 */
static void
ixgbe_disable_adapter_interrupts(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;

	/*
	 * mask all interrupts off
	 */
	IXGBE_WRITE_REG(hw, IXGBE_EIMC, 0xffffffff);

	/*
	 * for MSI-X, also disable autoclear
	 */
	if (ixgbe->intr_type == DDI_INTR_TYPE_MSIX) {
		IXGBE_WRITE_REG(hw, IXGBE_EIAC, 0x0);
	}

	IXGBE_WRITE_FLUSH(hw);
}

/*
 * ixgbe_enable_adapter_interrupts - Enable all hardware interrupts.
 */
static void
ixgbe_enable_adapter_interrupts(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	uint32_t eiac, eiam;
	uint32_t gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);

	/* interrupt types to enable */
	ixgbe->eims = IXGBE_EIMS_ENABLE_MASK;	/* shared code default */
	ixgbe->eims &= ~IXGBE_EIMS_TCP_TIMER;	/* minus tcp timer */
	ixgbe->eims |= ixgbe->capab->other_intr; /* "other" interrupt types */

	/* enable automask on "other" causes that this adapter can generate */
	eiam = ixgbe->capab->other_intr;

	/*
	 * msi-x mode
	 */
	if (ixgbe->intr_type == DDI_INTR_TYPE_MSIX) {
		/* enable autoclear but not on bits 29:20 */
		eiac = (ixgbe->eims & ~IXGBE_OTHER_INTR);

		/* general purpose interrupt enable */
		gpie |= (IXGBE_GPIE_MSIX_MODE
		    | IXGBE_GPIE_PBA_SUPPORT
		    | IXGBE_GPIE_OCD
		    | IXGBE_GPIE_EIAME);
	/*
	 * non-msi-x mode
	 */
	} else {

		/* disable autoclear, leave gpie at default */
		eiac = 0;

		/*
		 * General purpose interrupt enable.
		 * For 82599, extended interrupt automask enable
		 * only in MSI or MSI-X mode
		 */
		if ((hw->mac.type < ixgbe_mac_82599EB) ||
		    (ixgbe->intr_type == DDI_INTR_TYPE_MSI)) {
			gpie |= IXGBE_GPIE_EIAME;
		}
	}
	/* Enable specific interrupts for 82599  */
	if (hw->mac.type == ixgbe_mac_82599EB) {
		gpie |= IXGBE_SDP2_GPIEN; /* pluggable optics intr */
		gpie |= IXGBE_SDP1_GPIEN; /* LSC interrupt */
	}

	/* write to interrupt control registers */
	IXGBE_WRITE_REG(hw, IXGBE_EIMS, ixgbe->eims);
	IXGBE_WRITE_REG(hw, IXGBE_EIAC, eiac);
	IXGBE_WRITE_REG(hw, IXGBE_EIAM, eiam);
	IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
	IXGBE_WRITE_FLUSH(hw);
}

/*
 * ixgbe_loopback_ioctl - Loopback support.
 */
enum ioc_reply
ixgbe_loopback_ioctl(ixgbe_t *ixgbe, struct iocblk *iocp, mblk_t *mp)
{
	lb_info_sz_t *lbsp;
	lb_property_t *lbpp;
	uint32_t *lbmp;
	uint32_t size;
	uint32_t value;

	if (mp->b_cont == NULL)
		return (IOC_INVAL);

	switch (iocp->ioc_cmd) {
	default:
		return (IOC_INVAL);

	case LB_GET_INFO_SIZE:
		size = sizeof (lb_info_sz_t);
		if (iocp->ioc_count != size)
			return (IOC_INVAL);

		value = sizeof (lb_normal);
		value += sizeof (lb_mac);

		lbsp = (lb_info_sz_t *)(uintptr_t)mp->b_cont->b_rptr;
		*lbsp = value;
		break;

	case LB_GET_INFO:
		value = sizeof (lb_normal);
		value += sizeof (lb_mac);

		size = value;
		if (iocp->ioc_count != size)
			return (IOC_INVAL);

		value = 0;
		lbpp = (lb_property_t *)(uintptr_t)mp->b_cont->b_rptr;

		lbpp[value++] = lb_normal;
		lbpp[value++] = lb_mac;
		break;

	case LB_GET_MODE:
		size = sizeof (uint32_t);
		if (iocp->ioc_count != size)
			return (IOC_INVAL);

		lbmp = (uint32_t *)(uintptr_t)mp->b_cont->b_rptr;
		*lbmp = ixgbe->loopback_mode;
		break;

	case LB_SET_MODE:
		size = 0;
		if (iocp->ioc_count != sizeof (uint32_t))
			return (IOC_INVAL);

		lbmp = (uint32_t *)(uintptr_t)mp->b_cont->b_rptr;
		if (!ixgbe_set_loopback_mode(ixgbe, *lbmp))
			return (IOC_INVAL);
		break;
	}

	iocp->ioc_count = size;
	iocp->ioc_error = 0;

	if (ixgbe_check_acc_handle(ixgbe->osdep.reg_handle) != DDI_FM_OK) {
		ddi_fm_service_impact(ixgbe->dip, DDI_SERVICE_DEGRADED);
		return (IOC_INVAL);
	}

	return (IOC_REPLY);
}

/*
 * ixgbe_set_loopback_mode - Setup loopback based on the loopback mode.
 */
static boolean_t
ixgbe_set_loopback_mode(ixgbe_t *ixgbe, uint32_t mode)
{
	struct ixgbe_hw *hw;

	if (mode == ixgbe->loopback_mode)
		return (B_TRUE);

	hw = &ixgbe->hw;

	ixgbe->loopback_mode = mode;

	if (mode == IXGBE_LB_NONE) {
		/*
		 * Reset the chip
		 */
		hw->phy.autoneg_wait_to_complete = B_TRUE;
		(void) ixgbe_reset(ixgbe);
		hw->phy.autoneg_wait_to_complete = B_FALSE;
		return (B_TRUE);
	}

	mutex_enter(&ixgbe->gen_lock);

	switch (mode) {
	default:
		mutex_exit(&ixgbe->gen_lock);
		return (B_FALSE);

	case IXGBE_LB_INTERNAL_MAC:
		ixgbe_set_internal_mac_loopback(ixgbe);
		break;
	}

	mutex_exit(&ixgbe->gen_lock);

	return (B_TRUE);
}

/*
 * ixgbe_set_internal_mac_loopback - Set the internal MAC loopback mode.
 */
static void
ixgbe_set_internal_mac_loopback(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw;
	uint32_t reg;
	uint8_t atlas;

	hw = &ixgbe->hw;

	/*
	 * Setup MAC loopback
	 */
	reg = IXGBE_READ_REG(&ixgbe->hw, IXGBE_HLREG0);
	reg |= IXGBE_HLREG0_LPBK;
	IXGBE_WRITE_REG(&ixgbe->hw, IXGBE_HLREG0, reg);

	reg = IXGBE_READ_REG(&ixgbe->hw, IXGBE_AUTOC);
	reg &= ~IXGBE_AUTOC_LMS_MASK;
	IXGBE_WRITE_REG(&ixgbe->hw, IXGBE_AUTOC, reg);

	/*
	 * Disable Atlas Tx lanes to keep packets in loopback and not on wire
	 */
	if (hw->mac.type == ixgbe_mac_82598EB) {
		(void) ixgbe_read_analog_reg8(&ixgbe->hw, IXGBE_ATLAS_PDN_LPBK,
		    &atlas);
		atlas |= IXGBE_ATLAS_PDN_TX_REG_EN;
		(void) ixgbe_write_analog_reg8(&ixgbe->hw, IXGBE_ATLAS_PDN_LPBK,
		    atlas);

		(void) ixgbe_read_analog_reg8(&ixgbe->hw, IXGBE_ATLAS_PDN_10G,
		    &atlas);
		atlas |= IXGBE_ATLAS_PDN_TX_10G_QL_ALL;
		(void) ixgbe_write_analog_reg8(&ixgbe->hw, IXGBE_ATLAS_PDN_10G,
		    atlas);

		(void) ixgbe_read_analog_reg8(&ixgbe->hw, IXGBE_ATLAS_PDN_1G,
		    &atlas);
		atlas |= IXGBE_ATLAS_PDN_TX_1G_QL_ALL;
		(void) ixgbe_write_analog_reg8(&ixgbe->hw, IXGBE_ATLAS_PDN_1G,
		    atlas);

		(void) ixgbe_read_analog_reg8(&ixgbe->hw, IXGBE_ATLAS_PDN_AN,
		    &atlas);
		atlas |= IXGBE_ATLAS_PDN_TX_AN_QL_ALL;
		(void) ixgbe_write_analog_reg8(&ixgbe->hw, IXGBE_ATLAS_PDN_AN,
		    atlas);
	}
}

#pragma inline(ixgbe_intr_rx_work)
/*
 * ixgbe_intr_rx_work - RX processing of ISR.
 */
static void
ixgbe_intr_rx_work(ixgbe_rx_ring_t *rx_ring)
{
	mblk_t *mp;

	mutex_enter(&rx_ring->rx_lock);

	mp = ixgbe_ring_rx(rx_ring, IXGBE_POLL_NULL);
	mutex_exit(&rx_ring->rx_lock);

	if (mp != NULL)
		mac_rx_ring(rx_ring->ixgbe->mac_hdl, rx_ring->ring_handle, mp,
		    rx_ring->ring_gen_num);
}

#pragma inline(ixgbe_intr_tx_work)
/*
 * ixgbe_intr_tx_work - TX processing of ISR.
 */
static void
ixgbe_intr_tx_work(ixgbe_tx_ring_t *tx_ring)
{
	/*
	 * Recycle the tx descriptors
	 */
	tx_ring->tx_recycle(tx_ring);

	/*
	 * Schedule the re-transmit
	 */
	if (tx_ring->reschedule &&
	    (tx_ring->tbd_free >= tx_ring->resched_thresh)) {
		tx_ring->reschedule = B_FALSE;
		mac_tx_ring_update(tx_ring->ixgbe->mac_hdl,
		    tx_ring->ring_handle);
		IXGBE_DEBUG_STAT(tx_ring->stat_reschedule);
	}
}

#pragma inline(ixgbe_intr_other_work)
/*
 * ixgbe_intr_other_work - Process interrupt types other than tx/rx
 */
static void
ixgbe_intr_other_work(ixgbe_t *ixgbe, uint32_t eicr)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	/*
	 * dispatch taskq to handle link status change
	 */
	if (eicr & IXGBE_EICR_LSC) {
		if ((ddi_taskq_dispatch(ixgbe->lsc_taskq,
		    ixgbe_driver_link_check, (void *)ixgbe, DDI_NOSLEEP))
		    != DDI_SUCCESS) {
			ixgbe_log(ixgbe, "Fail to dispatch taskq");
		}
	}

	/*
	 * check for fan failure on adapters with fans
	 */
	if ((ixgbe->capab->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
	    (eicr & IXGBE_EICR_GPI_SDP1)) {
		if (hw->mac.type < ixgbe_mac_82599EB) {
			ixgbe_log(ixgbe,
			    "Fan has stopped, replace the adapter\n");

			/* re-enable the interrupt, which was automasked */
			ixgbe->eims |= IXGBE_EICR_GPI_SDP1;
		}
	}

	/*
	 * Do SFP check for 82599
	 */
	if (hw->mac.type == ixgbe_mac_82599EB) {
		if ((ddi_taskq_dispatch(ixgbe->lsc_taskq,
		    ixgbe_sfp_check, (void *)ixgbe,
		    DDI_NOSLEEP)) != DDI_SUCCESS) {
			ixgbe_log(ixgbe, "No memory available to dispatch "
			    "taskq for SFP check");
		}
	}
}

/*
 * ixgbe_intr_legacy - Interrupt handler for legacy interrupts.
 */
static uint_t
ixgbe_intr_legacy(void *arg1, void *arg2)
{
	ixgbe_t *ixgbe = (ixgbe_t *)arg1;
	struct ixgbe_hw *hw = &ixgbe->hw;
	ixgbe_tx_ring_t *tx_ring;
	ixgbe_rx_ring_t *rx_ring;
	uint32_t eicr;
	mblk_t *mp;
	boolean_t tx_reschedule;
	uint_t result;

	_NOTE(ARGUNUSED(arg2));

	mutex_enter(&ixgbe->gen_lock);

	if (ixgbe->ixgbe_state & IXGBE_SUSPENDED) {
		mutex_exit(&ixgbe->gen_lock);
		return (DDI_INTR_UNCLAIMED);
	}

	mp = NULL;
	tx_reschedule = B_FALSE;

	/*
	 * Any bit set in eicr: claim this interrupt
	 */
	eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
	if (eicr) {
		/*
		 * For legacy interrupt, we have only one interrupt,
		 * so we have only one rx ring and one tx ring enabled.
		 */
		ASSERT(ixgbe->num_rx_rings == 1);
		ASSERT(ixgbe->num_tx_rings == 1);

		/*
		 * For legacy interrupt, rx rings[0] will use RTxQ[0].
		 */
		if (eicr & 0x1) {
			ixgbe->eimc |= IXGBE_EICR_RTX_QUEUE;
			IXGBE_WRITE_REG(hw, IXGBE_EIMC, ixgbe->eimc);
			ixgbe->eims |= IXGBE_EICR_RTX_QUEUE;
			/*
			 * Clean the rx descriptors
			 */
			rx_ring = &ixgbe->rx_rings[0];
			mp = ixgbe_ring_rx(rx_ring, IXGBE_POLL_NULL);
		}

		/*
		 * For legacy interrupt, tx rings[0] will use RTxQ[1].
		 */
		if (eicr & 0x2) {
			/*
			 * Recycle the tx descriptors
			 */
			tx_ring = &ixgbe->tx_rings[0];
			tx_ring->tx_recycle(tx_ring);

			/*
			 * Schedule the re-transmit
			 */
			tx_reschedule = (tx_ring->reschedule &&
			    (tx_ring->tbd_free >= tx_ring->resched_thresh));
		}

		/* any interrupt type other than tx/rx */
		if (eicr & ixgbe->capab->other_intr) {
			if (hw->mac.type < ixgbe_mac_82599EB) {
				ixgbe->eims &= ~(eicr & IXGBE_OTHER_INTR);
			}
			if (hw->mac.type == ixgbe_mac_82599EB) {
				ixgbe->eimc = IXGBE_82599_OTHER_INTR;
				IXGBE_WRITE_REG(hw, IXGBE_EIMC, ixgbe->eimc);
			}
			ixgbe_intr_other_work(ixgbe, eicr);
			ixgbe->eims &= ~(eicr & IXGBE_OTHER_INTR);
		}

		mutex_exit(&ixgbe->gen_lock);

		result = DDI_INTR_CLAIMED;
	} else {
		mutex_exit(&ixgbe->gen_lock);

		/*
		 * No interrupt cause bits set: don't claim this interrupt.
		 */
		result = DDI_INTR_UNCLAIMED;
	}

	/* re-enable the interrupts which were automasked */
	IXGBE_WRITE_REG(hw, IXGBE_EIMS, ixgbe->eims);

	/*
	 * Do the following work outside of the gen_lock
	 */
	if (mp != NULL) {
		mac_rx_ring(rx_ring->ixgbe->mac_hdl, rx_ring->ring_handle, mp,
		    rx_ring->ring_gen_num);
	}

	if (tx_reschedule)  {
		tx_ring->reschedule = B_FALSE;
		mac_tx_ring_update(ixgbe->mac_hdl, tx_ring->ring_handle);
		IXGBE_DEBUG_STAT(tx_ring->stat_reschedule);
	}

	return (result);
}

/*
 * ixgbe_intr_msi - Interrupt handler for MSI.
 */
static uint_t
ixgbe_intr_msi(void *arg1, void *arg2)
{
	ixgbe_t *ixgbe = (ixgbe_t *)arg1;
	struct ixgbe_hw *hw = &ixgbe->hw;
	uint32_t eicr;

	_NOTE(ARGUNUSED(arg2));

	eicr = IXGBE_READ_REG(hw, IXGBE_EICR);

	/*
	 * For MSI interrupt, we have only one vector,
	 * so we have only one rx ring and one tx ring enabled.
	 */
	ASSERT(ixgbe->num_rx_rings == 1);
	ASSERT(ixgbe->num_tx_rings == 1);

	/*
	 * For MSI interrupt, rx rings[0] will use RTxQ[0].
	 */
	if (eicr & 0x1) {
		ixgbe_intr_rx_work(&ixgbe->rx_rings[0]);
	}

	/*
	 * For MSI interrupt, tx rings[0] will use RTxQ[1].
	 */
	if (eicr & 0x2) {
		ixgbe_intr_tx_work(&ixgbe->tx_rings[0]);
	}

	/* any interrupt type other than tx/rx */
	if (eicr & ixgbe->capab->other_intr) {
		mutex_enter(&ixgbe->gen_lock);
		if (hw->mac.type < ixgbe_mac_82599EB) {
			ixgbe->eims &= ~(eicr & IXGBE_OTHER_INTR);
		}
		if (hw->mac.type == ixgbe_mac_82599EB) {
			ixgbe->eimc = IXGBE_82599_OTHER_INTR;
			IXGBE_WRITE_REG(hw, IXGBE_EIMC, ixgbe->eimc);
		}
		ixgbe_intr_other_work(ixgbe, eicr);
		ixgbe->eims &= ~(eicr & IXGBE_OTHER_INTR);
		mutex_exit(&ixgbe->gen_lock);
	}

	/* re-enable the interrupts which were automasked */
	IXGBE_WRITE_REG(hw, IXGBE_EIMS, ixgbe->eims);

	return (DDI_INTR_CLAIMED);
}

/*
 * ixgbe_intr_msix - Interrupt handler for MSI-X.
 */
static uint_t
ixgbe_intr_msix(void *arg1, void *arg2)
{
	ixgbe_intr_vector_t *vect = (ixgbe_intr_vector_t *)arg1;
	ixgbe_t *ixgbe = vect->ixgbe;
	struct ixgbe_hw *hw = &ixgbe->hw;
	uint32_t eicr;
	int r_idx = 0;

	_NOTE(ARGUNUSED(arg2));

	/*
	 * Clean each rx ring that has its bit set in the map
	 */
	r_idx = bt_getlowbit(vect->rx_map, 0, (ixgbe->num_rx_rings - 1));
	while (r_idx >= 0) {
		ixgbe_intr_rx_work(&ixgbe->rx_rings[r_idx]);
		r_idx = bt_getlowbit(vect->rx_map, (r_idx + 1),
		    (ixgbe->num_rx_rings - 1));
	}

	/*
	 * Clean each tx ring that has its bit set in the map
	 */
	r_idx = bt_getlowbit(vect->tx_map, 0, (ixgbe->num_tx_rings - 1));
	while (r_idx >= 0) {
		ixgbe_intr_tx_work(&ixgbe->tx_rings[r_idx]);
		r_idx = bt_getlowbit(vect->tx_map, (r_idx + 1),
		    (ixgbe->num_tx_rings - 1));
	}


	/*
	 * Clean other interrupt (link change) that has its bit set in the map
	 */
	if (BT_TEST(vect->other_map, 0) == 1) {
		eicr = IXGBE_READ_REG(hw, IXGBE_EICR);

		/*
		 * Need check cause bits and only other causes will
		 * be processed
		 */
		/* any interrupt type other than tx/rx */
		if (eicr & ixgbe->capab->other_intr) {
			if (hw->mac.type < ixgbe_mac_82599EB) {
				mutex_enter(&ixgbe->gen_lock);
				ixgbe->eims &= ~(eicr & IXGBE_OTHER_INTR);
				ixgbe_intr_other_work(ixgbe, eicr);
				mutex_exit(&ixgbe->gen_lock);
			} else {
				if (hw->mac.type == ixgbe_mac_82599EB) {
					mutex_enter(&ixgbe->gen_lock);
					ixgbe->eims |= IXGBE_EICR_RTX_QUEUE;
					ixgbe_intr_other_work(ixgbe, eicr);
					mutex_exit(&ixgbe->gen_lock);
				}
			}
		}

		/* re-enable the interrupts which were automasked */
		IXGBE_WRITE_REG(hw, IXGBE_EIMS, ixgbe->eims);
	}

	return (DDI_INTR_CLAIMED);
}

/*
 * ixgbe_alloc_intrs - Allocate interrupts for the driver.
 *
 * Normal sequence is to try MSI-X; if not sucessful, try MSI;
 * if not successful, try Legacy.
 * ixgbe->intr_force can be used to force sequence to start with
 * any of the 3 types.
 * If MSI-X is not used, number of tx/rx rings is forced to 1.
 */
static int
ixgbe_alloc_intrs(ixgbe_t *ixgbe)
{
	dev_info_t *devinfo;
	int intr_types;
	int rc;

	devinfo = ixgbe->dip;

	/*
	 * Get supported interrupt types
	 */
	rc = ddi_intr_get_supported_types(devinfo, &intr_types);

	if (rc != DDI_SUCCESS) {
		ixgbe_log(ixgbe,
		    "Get supported interrupt types failed: %d", rc);
		return (IXGBE_FAILURE);
	}
	IXGBE_DEBUGLOG_1(ixgbe, "Supported interrupt types: %x", intr_types);

	ixgbe->intr_type = 0;

	/*
	 * Install MSI-X interrupts
	 */
	if ((intr_types & DDI_INTR_TYPE_MSIX) &&
	    (ixgbe->intr_force <= IXGBE_INTR_MSIX)) {
		rc = ixgbe_alloc_intr_handles(ixgbe, DDI_INTR_TYPE_MSIX);
		if (rc == IXGBE_SUCCESS)
			return (IXGBE_SUCCESS);

		ixgbe_log(ixgbe,
		    "Allocate MSI-X failed, trying MSI interrupts...");
	}

	/*
	 * MSI-X not used, force rings and groups to 1
	 */
	ixgbe->num_rx_rings = 1;
	ixgbe->num_rx_groups = 1;
	ixgbe->num_tx_rings = 1;
	ixgbe_log(ixgbe,
	    "MSI-X not used, force rings and groups number to 1");

	/*
	 * Install MSI interrupts
	 */
	if ((intr_types & DDI_INTR_TYPE_MSI) &&
	    (ixgbe->intr_force <= IXGBE_INTR_MSI)) {
		rc = ixgbe_alloc_intr_handles(ixgbe, DDI_INTR_TYPE_MSI);
		if (rc == IXGBE_SUCCESS)
			return (IXGBE_SUCCESS);

		ixgbe_log(ixgbe,
		    "Allocate MSI failed, trying Legacy interrupts...");
	}

	/*
	 * Install legacy interrupts
	 */
	if (intr_types & DDI_INTR_TYPE_FIXED) {
		rc = ixgbe_alloc_intr_handles(ixgbe, DDI_INTR_TYPE_FIXED);
		if (rc == IXGBE_SUCCESS)
			return (IXGBE_SUCCESS);

		ixgbe_log(ixgbe,
		    "Allocate Legacy interrupts failed");
	}

	/*
	 * If none of the 3 types succeeded, return failure
	 */
	return (IXGBE_FAILURE);
}

/*
 * ixgbe_alloc_intr_handles - Allocate interrupt handles.
 *
 * For legacy and MSI, only 1 handle is needed.  For MSI-X,
 * if fewer than 2 handles are available, return failure.
 * Upon success, this maps the vectors to rx and tx rings for
 * interrupts.
 */
static int
ixgbe_alloc_intr_handles(ixgbe_t *ixgbe, int intr_type)
{
	dev_info_t *devinfo;
	int request, count, avail, actual;
	int minimum;
	int rc;

	devinfo = ixgbe->dip;

	switch (intr_type) {
	case DDI_INTR_TYPE_FIXED:
		request = 1;	/* Request 1 legacy interrupt handle */
		minimum = 1;
		IXGBE_DEBUGLOG_0(ixgbe, "interrupt type: legacy");
		break;

	case DDI_INTR_TYPE_MSI:
		request = 1;	/* Request 1 MSI interrupt handle */
		minimum = 1;
		IXGBE_DEBUGLOG_0(ixgbe, "interrupt type: MSI");
		break;

	case DDI_INTR_TYPE_MSIX:
		/*
		 * Best number of vectors for the adapter is
		 * # rx rings + # tx rings.
		 */
		request = ixgbe->num_rx_rings + ixgbe->num_tx_rings;
		if (request > ixgbe->capab->max_ring_vect)
			request = ixgbe->capab->max_ring_vect;
		minimum = 2;
		IXGBE_DEBUGLOG_0(ixgbe, "interrupt type: MSI-X");
		break;

	default:
		ixgbe_log(ixgbe,
		    "invalid call to ixgbe_alloc_intr_handles(): %d\n",
		    intr_type);
		return (IXGBE_FAILURE);
	}
	IXGBE_DEBUGLOG_2(ixgbe, "interrupt handles requested: %d  minimum: %d",
	    request, minimum);

	/*
	 * Get number of supported interrupts
	 */
	rc = ddi_intr_get_nintrs(devinfo, intr_type, &count);
	if ((rc != DDI_SUCCESS) || (count < minimum)) {
		ixgbe_log(ixgbe,
		    "Get interrupt number failed. Return: %d, count: %d",
		    rc, count);
		return (IXGBE_FAILURE);
	}
	IXGBE_DEBUGLOG_1(ixgbe, "interrupts supported: %d", count);

	/*
	 * Get number of available interrupts
	 */
	rc = ddi_intr_get_navail(devinfo, intr_type, &avail);
	if ((rc != DDI_SUCCESS) || (avail < minimum)) {
		ixgbe_log(ixgbe,
		    "Get interrupt available number failed. "
		    "Return: %d, available: %d", rc, avail);
		return (IXGBE_FAILURE);
	}
	IXGBE_DEBUGLOG_1(ixgbe, "interrupts available: %d", avail);

	if (avail < request) {
		ixgbe_log(ixgbe, "Request %d handles, %d available",
		    request, avail);
		request = avail;
	}

	actual = 0;
	ixgbe->intr_cnt = 0;

	/*
	 * Allocate an array of interrupt handles
	 */
	ixgbe->intr_size = request * sizeof (ddi_intr_handle_t);
	ixgbe->htable = kmem_alloc(ixgbe->intr_size, KM_SLEEP);

	rc = ddi_intr_alloc(devinfo, ixgbe->htable, intr_type, 0,
	    request, &actual, DDI_INTR_ALLOC_NORMAL);
	if (rc != DDI_SUCCESS) {
		ixgbe_log(ixgbe, "Allocate interrupts failed. "
		    "return: %d, request: %d, actual: %d",
		    rc, request, actual);
		goto alloc_handle_fail;
	}
	IXGBE_DEBUGLOG_1(ixgbe, "interrupts actually allocated: %d", actual);

	ixgbe->intr_cnt = actual;

	/*
	 * Now we know the actual number of vectors.  Here we map the vector
	 * to other, rx rings and tx ring.
	 */
	if (actual < minimum) {
		ixgbe_log(ixgbe, "Insufficient interrupt handles available: %d",
		    actual);
		goto alloc_handle_fail;
	}

	/*
	 * Get priority for first vector, assume remaining are all the same
	 */
	rc = ddi_intr_get_pri(ixgbe->htable[0], &ixgbe->intr_pri);
	if (rc != DDI_SUCCESS) {
		ixgbe_log(ixgbe,
		    "Get interrupt priority failed: %d", rc);
		goto alloc_handle_fail;
	}

	rc = ddi_intr_get_cap(ixgbe->htable[0], &ixgbe->intr_cap);
	if (rc != DDI_SUCCESS) {
		ixgbe_log(ixgbe,
		    "Get interrupt cap failed: %d", rc);
		goto alloc_handle_fail;
	}

	ixgbe->intr_type = intr_type;

	return (IXGBE_SUCCESS);

alloc_handle_fail:
	ixgbe_rem_intrs(ixgbe);

	return (IXGBE_FAILURE);
}

/*
 * ixgbe_add_intr_handlers - Add interrupt handlers based on the interrupt type.
 *
 * Before adding the interrupt handlers, the interrupt vectors have
 * been allocated, and the rx/tx rings have also been allocated.
 */
static int
ixgbe_add_intr_handlers(ixgbe_t *ixgbe)
{
	int vector = 0;
	int rc;

	switch (ixgbe->intr_type) {
	case DDI_INTR_TYPE_MSIX:
		/*
		 * Add interrupt handler for all vectors
		 */
		for (vector = 0; vector < ixgbe->intr_cnt; vector++) {
			/*
			 * install pointer to vect_map[vector]
			 */
			rc = ddi_intr_add_handler(ixgbe->htable[vector],
			    (ddi_intr_handler_t *)ixgbe_intr_msix,
			    (void *)&ixgbe->vect_map[vector], NULL);

			if (rc != DDI_SUCCESS) {
				ixgbe_log(ixgbe,
				    "Add rx interrupt handler failed. "
				    "return: %d, vector: %d", rc, vector);
				for (vector--; vector >= 0; vector--) {
					(void) ddi_intr_remove_handler(
					    ixgbe->htable[vector]);
				}
				return (IXGBE_FAILURE);
			}
		}

		break;

	case DDI_INTR_TYPE_MSI:
		/*
		 * Add interrupt handlers for the only vector
		 */
		rc = ddi_intr_add_handler(ixgbe->htable[vector],
		    (ddi_intr_handler_t *)ixgbe_intr_msi,
		    (void *)ixgbe, NULL);

		if (rc != DDI_SUCCESS) {
			ixgbe_log(ixgbe,
			    "Add MSI interrupt handler failed: %d", rc);
			return (IXGBE_FAILURE);
		}

		break;

	case DDI_INTR_TYPE_FIXED:
		/*
		 * Add interrupt handlers for the only vector
		 */
		rc = ddi_intr_add_handler(ixgbe->htable[vector],
		    (ddi_intr_handler_t *)ixgbe_intr_legacy,
		    (void *)ixgbe, NULL);

		if (rc != DDI_SUCCESS) {
			ixgbe_log(ixgbe,
			    "Add legacy interrupt handler failed: %d", rc);
			return (IXGBE_FAILURE);
		}

		break;

	default:
		return (IXGBE_FAILURE);
	}

	return (IXGBE_SUCCESS);
}

#pragma inline(ixgbe_map_rxring_to_vector)
/*
 * ixgbe_map_rxring_to_vector - Map given rx ring to given interrupt vector.
 */
static void
ixgbe_map_rxring_to_vector(ixgbe_t *ixgbe, int r_idx, int v_idx)
{
	/*
	 * Set bit in map
	 */
	BT_SET(ixgbe->vect_map[v_idx].rx_map, r_idx);

	/*
	 * Count bits set
	 */
	ixgbe->vect_map[v_idx].rxr_cnt++;

	/*
	 * Remember bit position
	 */
	ixgbe->rx_rings[r_idx].intr_vector = v_idx;
	ixgbe->rx_rings[r_idx].vect_bit = 1 << v_idx;
}

#pragma inline(ixgbe_map_txring_to_vector)
/*
 * ixgbe_map_txring_to_vector - Map given tx ring to given interrupt vector.
 */
static void
ixgbe_map_txring_to_vector(ixgbe_t *ixgbe, int t_idx, int v_idx)
{
	/*
	 * Set bit in map
	 */
	BT_SET(ixgbe->vect_map[v_idx].tx_map, t_idx);

	/*
	 * Count bits set
	 */
	ixgbe->vect_map[v_idx].txr_cnt++;

	/*
	 * Remember bit position
	 */
	ixgbe->tx_rings[t_idx].intr_vector = v_idx;
	ixgbe->tx_rings[t_idx].vect_bit = 1 << v_idx;
}

/*
 * ixgbe_setup_ivar - Set the given entry in the given interrupt vector
 * allocation register (IVAR).
 * cause:
 *   -1 : other cause
 *    0 : rx
 *    1 : tx
 */
static void
ixgbe_setup_ivar(ixgbe_t *ixgbe, uint16_t intr_alloc_entry, uint8_t msix_vector,
    int8_t cause)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	u32 ivar, index;

	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		msix_vector |= IXGBE_IVAR_ALLOC_VAL;
		if (cause == -1) {
			cause = 0;
		}
		index = (((cause * 64) + intr_alloc_entry) >> 2) & 0x1F;
		ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
		ivar &= ~(0xFF << (8 * (intr_alloc_entry & 0x3)));
		ivar |= (msix_vector << (8 * (intr_alloc_entry & 0x3)));
		IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
		break;
	case ixgbe_mac_82599EB:
		if (cause == -1) {
			/* other causes */
			msix_vector |= IXGBE_IVAR_ALLOC_VAL;
			index = (intr_alloc_entry & 1) * 8;
			ivar = IXGBE_READ_REG(hw, IXGBE_IVAR_MISC);
			ivar &= ~(0xFF << index);
			ivar |= (msix_vector << index);
			IXGBE_WRITE_REG(hw, IXGBE_IVAR_MISC, ivar);
		} else {
			/* tx or rx causes */
			msix_vector |= IXGBE_IVAR_ALLOC_VAL;
			index = ((16 * (intr_alloc_entry & 1)) + (8 * cause));
			ivar = IXGBE_READ_REG(hw,
			    IXGBE_IVAR(intr_alloc_entry >> 1));
			ivar &= ~(0xFF << index);
			ivar |= (msix_vector << index);
			IXGBE_WRITE_REG(hw, IXGBE_IVAR(intr_alloc_entry >> 1),
			    ivar);
		}
		break;
	default:
		break;
	}
}

/*
 * ixgbe_enable_ivar - Enable the given entry by setting the VAL bit of
 * given interrupt vector allocation register (IVAR).
 * cause:
 *   -1 : other cause
 *    0 : rx
 *    1 : tx
 */
static void
ixgbe_enable_ivar(ixgbe_t *ixgbe, uint16_t intr_alloc_entry, int8_t cause)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	u32 ivar, index;

	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		if (cause == -1) {
			cause = 0;
		}
		index = (((cause * 64) + intr_alloc_entry) >> 2) & 0x1F;
		ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
		ivar |= (IXGBE_IVAR_ALLOC_VAL << (8 *
		    (intr_alloc_entry & 0x3)));
		IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
		break;
	case ixgbe_mac_82599EB:
		if (cause == -1) {
			/* other causes */
			index = (intr_alloc_entry & 1) * 8;
			ivar = IXGBE_READ_REG(hw, IXGBE_IVAR_MISC);
			ivar |= (IXGBE_IVAR_ALLOC_VAL << index);
			IXGBE_WRITE_REG(hw, IXGBE_IVAR_MISC, ivar);
		} else {
			/* tx or rx causes */
			index = ((16 * (intr_alloc_entry & 1)) + (8 * cause));
			ivar = IXGBE_READ_REG(hw,
			    IXGBE_IVAR(intr_alloc_entry >> 1));
			ivar |= (IXGBE_IVAR_ALLOC_VAL << index);
			IXGBE_WRITE_REG(hw, IXGBE_IVAR(intr_alloc_entry >> 1),
			    ivar);
		}
		break;
	default:
		break;
	}
}

/*
 * ixgbe_disable_ivar - Disble the given entry by clearing the VAL bit of
 * given interrupt vector allocation register (IVAR).
 * cause:
 *   -1 : other cause
 *    0 : rx
 *    1 : tx
 */
static void
ixgbe_disable_ivar(ixgbe_t *ixgbe, uint16_t intr_alloc_entry, int8_t cause)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	u32 ivar, index;

	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		if (cause == -1) {
			cause = 0;
		}
		index = (((cause * 64) + intr_alloc_entry) >> 2) & 0x1F;
		ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
		ivar &= ~(IXGBE_IVAR_ALLOC_VAL<< (8 *
		    (intr_alloc_entry & 0x3)));
		IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
		break;
	case ixgbe_mac_82599EB:
		if (cause == -1) {
			/* other causes */
			index = (intr_alloc_entry & 1) * 8;
			ivar = IXGBE_READ_REG(hw, IXGBE_IVAR_MISC);
			ivar &= ~(IXGBE_IVAR_ALLOC_VAL << index);
			IXGBE_WRITE_REG(hw, IXGBE_IVAR_MISC, ivar);
		} else {
			/* tx or rx causes */
			index = ((16 * (intr_alloc_entry & 1)) + (8 * cause));
			ivar = IXGBE_READ_REG(hw,
			    IXGBE_IVAR(intr_alloc_entry >> 1));
			ivar &= ~(IXGBE_IVAR_ALLOC_VAL << index);
			IXGBE_WRITE_REG(hw, IXGBE_IVAR(intr_alloc_entry >> 1),
			    ivar);
		}
		break;
	default:
		break;
	}
}

/*
 * ixgbe_map_intrs_to_vectors - Map different interrupts to MSI-X vectors.
 *
 * For MSI-X, here will map rx interrupt, tx interrupt and other interrupt
 * to vector[0 - (intr_cnt -1)].
 */
static int
ixgbe_map_intrs_to_vectors(ixgbe_t *ixgbe)
{
	int i, vector = 0;

	/* initialize vector map */
	bzero(&ixgbe->vect_map, sizeof (ixgbe->vect_map));
	for (i = 0; i < ixgbe->intr_cnt; i++) {
		ixgbe->vect_map[i].ixgbe = ixgbe;
	}

	/*
	 * non-MSI-X case is very simple: rx rings[0] on RTxQ[0],
	 * tx rings[0] on RTxQ[1].
	 */
	if (ixgbe->intr_type != DDI_INTR_TYPE_MSIX) {
		ixgbe_map_rxring_to_vector(ixgbe, 0, 0);
		ixgbe_map_txring_to_vector(ixgbe, 0, 1);
		return (IXGBE_SUCCESS);
	}

	/*
	 * Interrupts/vectors mapping for MSI-X
	 */

	/*
	 * Map other interrupt to vector 0,
	 * Set bit in map and count the bits set.
	 */
	BT_SET(ixgbe->vect_map[vector].other_map, 0);
	ixgbe->vect_map[vector].other_cnt++;
	vector++;

	/*
	 * Map rx ring interrupts to vectors
	 */
	for (i = 0; i < ixgbe->num_rx_rings; i++) {
		ixgbe_map_rxring_to_vector(ixgbe, i, vector);
		vector = (vector +1) % ixgbe->intr_cnt;
	}

	/*
	 * Map tx ring interrupts to vectors
	 */
	for (i = 0; i < ixgbe->num_tx_rings; i++) {
		ixgbe_map_txring_to_vector(ixgbe, i, vector);
		vector = (vector +1) % ixgbe->intr_cnt;
	}

	return (IXGBE_SUCCESS);
}

/*
 * ixgbe_setup_adapter_vector - Setup the adapter interrupt vector(s).
 *
 * This relies on ring/vector mapping already set up in the
 * vect_map[] structures
 */
static void
ixgbe_setup_adapter_vector(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	ixgbe_intr_vector_t *vect;	/* vector bitmap */
	int r_idx;	/* ring index */
	int v_idx;	/* vector index */

	/*
	 * Clear any previous entries
	 */
	switch (hw->mac.type) {
	case ixgbe_mac_82598EB:
		for (v_idx = 0; v_idx < 25; v_idx++)
			IXGBE_WRITE_REG(hw, IXGBE_IVAR(v_idx), 0);

		break;
	case ixgbe_mac_82599EB:
		for (v_idx = 0; v_idx < 64; v_idx++)
			IXGBE_WRITE_REG(hw, IXGBE_IVAR(v_idx), 0);
		IXGBE_WRITE_REG(hw, IXGBE_IVAR_MISC, 0);

		break;
	default:
		break;
	}

	/*
	 * For non MSI-X interrupt, rx rings[0] will use RTxQ[0], and
	 * tx rings[0] will use RTxQ[1].
	 */
	if (ixgbe->intr_type != DDI_INTR_TYPE_MSIX) {
		ixgbe_setup_ivar(ixgbe, 0, 0, 0);
		ixgbe_setup_ivar(ixgbe, 0, 1, 1);
		return;
	}

	/*
	 * For MSI-X interrupt, "Other" is always on vector[0].
	 */
	ixgbe_setup_ivar(ixgbe, IXGBE_IVAR_OTHER_CAUSES_INDEX, 0, -1);

	/*
	 * For each interrupt vector, populate the IVAR table
	 */
	for (v_idx = 0; v_idx < ixgbe->intr_cnt; v_idx++) {
		vect = &ixgbe->vect_map[v_idx];

		/*
		 * For each rx ring bit set
		 */
		r_idx = bt_getlowbit(vect->rx_map, 0,
		    (ixgbe->num_rx_rings - 1));

		while (r_idx >= 0) {
			ixgbe_setup_ivar(ixgbe, r_idx, v_idx, 0);
			r_idx = bt_getlowbit(vect->rx_map, (r_idx + 1),
			    (ixgbe->num_rx_rings - 1));
		}

		/*
		 * For each tx ring bit set
		 */
		r_idx = bt_getlowbit(vect->tx_map, 0,
		    (ixgbe->num_tx_rings - 1));

		while (r_idx >= 0) {
			ixgbe_setup_ivar(ixgbe, r_idx, v_idx, 1);
			r_idx = bt_getlowbit(vect->tx_map, (r_idx + 1),
			    (ixgbe->num_tx_rings - 1));
		}
	}
}

/*
 * ixgbe_rem_intr_handlers - Remove the interrupt handlers.
 */
static void
ixgbe_rem_intr_handlers(ixgbe_t *ixgbe)
{
	int i;
	int rc;

	for (i = 0; i < ixgbe->intr_cnt; i++) {
		rc = ddi_intr_remove_handler(ixgbe->htable[i]);
		if (rc != DDI_SUCCESS) {
			IXGBE_DEBUGLOG_1(ixgbe,
			    "Remove intr handler failed: %d", rc);
		}
	}
}

/*
 * ixgbe_rem_intrs - Remove the allocated interrupts.
 */
static void
ixgbe_rem_intrs(ixgbe_t *ixgbe)
{
	int i;
	int rc;

	for (i = 0; i < ixgbe->intr_cnt; i++) {
		rc = ddi_intr_free(ixgbe->htable[i]);
		if (rc != DDI_SUCCESS) {
			IXGBE_DEBUGLOG_1(ixgbe,
			    "Free intr failed: %d", rc);
		}
	}

	kmem_free(ixgbe->htable, ixgbe->intr_size);
	ixgbe->htable = NULL;
}

/*
 * ixgbe_enable_intrs - Enable all the ddi interrupts.
 */
static int
ixgbe_enable_intrs(ixgbe_t *ixgbe)
{
	int i;
	int rc;

	/*
	 * Enable interrupts
	 */
	if (ixgbe->intr_cap & DDI_INTR_FLAG_BLOCK) {
		/*
		 * Call ddi_intr_block_enable() for MSI
		 */
		rc = ddi_intr_block_enable(ixgbe->htable, ixgbe->intr_cnt);
		if (rc != DDI_SUCCESS) {
			ixgbe_log(ixgbe,
			    "Enable block intr failed: %d", rc);
			return (IXGBE_FAILURE);
		}
	} else {
		/*
		 * Call ddi_intr_enable() for Legacy/MSI non block enable
		 */
		for (i = 0; i < ixgbe->intr_cnt; i++) {
			rc = ddi_intr_enable(ixgbe->htable[i]);
			if (rc != DDI_SUCCESS) {
				ixgbe_log(ixgbe,
				    "Enable intr failed: %d", rc);
				return (IXGBE_FAILURE);
			}
		}
	}

	return (IXGBE_SUCCESS);
}

/*
 * ixgbe_disable_intrs - Disable all the interrupts.
 */
static int
ixgbe_disable_intrs(ixgbe_t *ixgbe)
{
	int i;
	int rc;

	/*
	 * Disable all interrupts
	 */
	if (ixgbe->intr_cap & DDI_INTR_FLAG_BLOCK) {
		rc = ddi_intr_block_disable(ixgbe->htable, ixgbe->intr_cnt);
		if (rc != DDI_SUCCESS) {
			ixgbe_log(ixgbe,
			    "Disable block intr failed: %d", rc);
			return (IXGBE_FAILURE);
		}
	} else {
		for (i = 0; i < ixgbe->intr_cnt; i++) {
			rc = ddi_intr_disable(ixgbe->htable[i]);
			if (rc != DDI_SUCCESS) {
				ixgbe_log(ixgbe,
				    "Disable intr failed: %d", rc);
				return (IXGBE_FAILURE);
			}
		}
	}

	return (IXGBE_SUCCESS);
}

/*
 * ixgbe_get_hw_state - Get and save parameters related to adapter hardware.
 */
static void
ixgbe_get_hw_state(ixgbe_t *ixgbe)
{
	struct ixgbe_hw *hw = &ixgbe->hw;
	ixgbe_link_speed speed = IXGBE_LINK_SPEED_UNKNOWN;
	boolean_t link_up = B_FALSE;
	uint32_t pcs1g_anlp = 0;
	uint32_t pcs1g_ana = 0;

	ASSERT(mutex_owned(&ixgbe->gen_lock));
	ixgbe->param_lp_1000fdx_cap = 0;
	ixgbe->param_lp_100fdx_cap  = 0;

	/* check for link, don't wait */
	(void) ixgbe_check_link(hw, &speed, &link_up, false);
	if (link_up) {
		pcs1g_anlp = IXGBE_READ_REG(hw, IXGBE_PCS1GANLP);
		pcs1g_ana = IXGBE_READ_REG(hw, IXGBE_PCS1GANA);

		ixgbe->param_lp_1000fdx_cap =
		    (pcs1g_anlp & IXGBE_PCS1GANLP_LPFD) ? 1 : 0;
		ixgbe->param_lp_100fdx_cap =
		    (pcs1g_anlp & IXGBE_PCS1GANLP_LPFD) ? 1 : 0;
	}

	ixgbe->param_1000fdx_cap = (pcs1g_ana & IXGBE_PCS1GANA_FDC)  ? 1 : 0;
	ixgbe->param_100fdx_cap = (pcs1g_ana & IXGBE_PCS1GANA_FDC)  ? 1 : 0;
}

/*
 * ixgbe_get_driver_control - Notify that driver is in control of device.
 */
static void
ixgbe_get_driver_control(struct ixgbe_hw *hw)
{
	uint32_t ctrl_ext;

	/*
	 * Notify firmware that driver is in control of device
	 */
	ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
	ctrl_ext |= IXGBE_CTRL_EXT_DRV_LOAD;
	IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
}

/*
 * ixgbe_release_driver_control - Notify that driver is no longer in control
 * of device.
 */
static void
ixgbe_release_driver_control(struct ixgbe_hw *hw)
{
	uint32_t ctrl_ext;

	/*
	 * Notify firmware that driver is no longer in control of device
	 */
	ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
	ctrl_ext &= ~IXGBE_CTRL_EXT_DRV_LOAD;
	IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
}

/*
 * ixgbe_atomic_reserve - Atomic decrease operation.
 */
int
ixgbe_atomic_reserve(uint32_t *count_p, uint32_t n)
{
	uint32_t oldval;
	uint32_t newval;

	/*
	 * ATOMICALLY
	 */
	do {
		oldval = *count_p;
		if (oldval < n)
			return (-1);
		newval = oldval - n;
	} while (atomic_cas_32(count_p, oldval, newval) != oldval);

	return (newval);
}

/*
 * ixgbe_mc_table_itr - Traverse the entries in the multicast table.
 */
static uint8_t *
ixgbe_mc_table_itr(struct ixgbe_hw *hw, uint8_t **upd_ptr, uint32_t *vmdq)
{
	uint8_t *addr = *upd_ptr;
	uint8_t *new_ptr;

	_NOTE(ARGUNUSED(hw));
	_NOTE(ARGUNUSED(vmdq));

	new_ptr = addr + IXGBE_ETH_LENGTH_OF_ADDRESS;
	*upd_ptr = new_ptr;
	return (addr);
}

/*
 * FMA support
 */
int
ixgbe_check_acc_handle(ddi_acc_handle_t handle)
{
	ddi_fm_error_t de;

	ddi_fm_acc_err_get(handle, &de, DDI_FME_VERSION);
	ddi_fm_acc_err_clear(handle, DDI_FME_VERSION);
	return (de.fme_status);
}

int
ixgbe_check_dma_handle(ddi_dma_handle_t handle)
{
	ddi_fm_error_t de;

	ddi_fm_dma_err_get(handle, &de, DDI_FME_VERSION);
	return (de.fme_status);
}

/*
 * ixgbe_fm_error_cb - The IO fault service error handling callback function.
 */
static int
ixgbe_fm_error_cb(dev_info_t *dip, ddi_fm_error_t *err, const void *impl_data)
{
	_NOTE(ARGUNUSED(impl_data));
	/*
	 * as the driver can always deal with an error in any dma or
	 * access handle, we can just return the fme_status value.
	 */
	pci_ereport_post(dip, err, NULL);
	return (err->fme_status);
}

static void
ixgbe_fm_init(ixgbe_t *ixgbe)
{
	ddi_iblock_cookie_t iblk;
	int fma_acc_flag, fma_dma_flag;

	/*
	 * Only register with IO Fault Services if we have some capability
	 */
	if (ixgbe->fm_capabilities & DDI_FM_ACCCHK_CAPABLE) {
		ixgbe_regs_acc_attr.devacc_attr_access = DDI_FLAGERR_ACC;
		fma_acc_flag = 1;
	} else {
		ixgbe_regs_acc_attr.devacc_attr_access = DDI_DEFAULT_ACC;
		fma_acc_flag = 0;
	}

	if (ixgbe->fm_capabilities & DDI_FM_DMACHK_CAPABLE) {
		fma_dma_flag = 1;
	} else {
		fma_dma_flag = 0;
	}

	ixgbe_set_fma_flags(fma_acc_flag, fma_dma_flag);

	if (ixgbe->fm_capabilities) {

		/*
		 * Register capabilities with IO Fault Services
		 */
		ddi_fm_init(ixgbe->dip, &ixgbe->fm_capabilities, &iblk);

		/*
		 * Initialize pci ereport capabilities if ereport capable
		 */
		if (DDI_FM_EREPORT_CAP(ixgbe->fm_capabilities) ||
		    DDI_FM_ERRCB_CAP(ixgbe->fm_capabilities))
			pci_ereport_setup(ixgbe->dip);

		/*
		 * Register error callback if error callback capable
		 */
		if (DDI_FM_ERRCB_CAP(ixgbe->fm_capabilities))
			ddi_fm_handler_register(ixgbe->dip,
			    ixgbe_fm_error_cb, (void*) ixgbe);
	}
}

static void
ixgbe_fm_fini(ixgbe_t *ixgbe)
{
	/*
	 * Only unregister FMA capabilities if they are registered
	 */
	if (ixgbe->fm_capabilities) {

		/*
		 * Release any resources allocated by pci_ereport_setup()
		 */
		if (DDI_FM_EREPORT_CAP(ixgbe->fm_capabilities) ||
		    DDI_FM_ERRCB_CAP(ixgbe->fm_capabilities))
			pci_ereport_teardown(ixgbe->dip);

		/*
		 * Un-register error callback if error callback capable
		 */
		if (DDI_FM_ERRCB_CAP(ixgbe->fm_capabilities))
			ddi_fm_handler_unregister(ixgbe->dip);

		/*
		 * Unregister from IO Fault Service
		 */
		ddi_fm_fini(ixgbe->dip);
	}
}

void
ixgbe_fm_ereport(ixgbe_t *ixgbe, char *detail)
{
	uint64_t ena;
	char buf[FM_MAX_CLASS];

	(void) snprintf(buf, FM_MAX_CLASS, "%s.%s", DDI_FM_DEVICE, detail);
	ena = fm_ena_generate(0, FM_ENA_FMT1);
	if (DDI_FM_EREPORT_CAP(ixgbe->fm_capabilities)) {
		ddi_fm_ereport_post(ixgbe->dip, buf, ena, DDI_NOSLEEP,
		    FM_VERSION, DATA_TYPE_UINT8, FM_EREPORT_VERS0, NULL);
	}
}

static int
ixgbe_ring_start(mac_ring_driver_t rh, uint64_t mr_gen_num)
{
	ixgbe_rx_ring_t *rx_ring = (ixgbe_rx_ring_t *)rh;

	mutex_enter(&rx_ring->rx_lock);
	rx_ring->ring_gen_num = mr_gen_num;
	mutex_exit(&rx_ring->rx_lock);
	return (0);
}

/*
 * Callback funtion for MAC layer to register all rings.
 */
/* ARGSUSED */
void
ixgbe_fill_ring(void *arg, mac_ring_type_t rtype, const int rg_index,
    const int ring_index, mac_ring_info_t *infop, mac_ring_handle_t rh)
{
	ixgbe_t *ixgbe = (ixgbe_t *)arg;
	mac_intr_t *mintr = &infop->mri_intr;

	switch (rtype) {
	case MAC_RING_TYPE_RX: {
		ASSERT(rg_index == 0);
		ASSERT(ring_index < ixgbe->num_rx_rings);

		ixgbe_rx_ring_t *rx_ring = &ixgbe->rx_rings[ring_index];
		rx_ring->ring_handle = rh;

		infop->mri_driver = (mac_ring_driver_t)rx_ring;
		infop->mri_start = ixgbe_ring_start;
		infop->mri_stop = NULL;
		infop->mri_poll = ixgbe_ring_rx_poll;

		mintr->mi_handle = (mac_intr_handle_t)rx_ring;
		mintr->mi_enable = ixgbe_rx_ring_intr_enable;
		mintr->mi_disable = ixgbe_rx_ring_intr_disable;

		break;
	}
	case MAC_RING_TYPE_TX: {
		ASSERT(rg_index == -1);
		ASSERT(ring_index < ixgbe->num_tx_rings);

		ixgbe_tx_ring_t *tx_ring = &ixgbe->tx_rings[ring_index];
		tx_ring->ring_handle = rh;

		infop->mri_driver = (mac_ring_driver_t)tx_ring;
		infop->mri_start = NULL;
		infop->mri_stop = NULL;
		infop->mri_tx = ixgbe_ring_tx;

		break;
	}
	default:
		break;
	}
}

/*
 * Callback funtion for MAC layer to register all groups.
 */
void
ixgbe_fill_group(void *arg, mac_ring_type_t rtype, const int index,
    mac_group_info_t *infop, mac_group_handle_t gh)
{
	ixgbe_t *ixgbe = (ixgbe_t *)arg;

	switch (rtype) {
	case MAC_RING_TYPE_RX: {
		ixgbe_rx_group_t *rx_group;

		rx_group = &ixgbe->rx_groups[index];
		rx_group->group_handle = gh;

		infop->mgi_driver = (mac_group_driver_t)rx_group;
		infop->mgi_start = NULL;
		infop->mgi_stop = NULL;
		infop->mgi_addmac = ixgbe_addmac;
		infop->mgi_remmac = ixgbe_remmac;
		infop->mgi_count = (ixgbe->num_rx_rings / ixgbe->num_rx_groups);

		break;
	}
	case MAC_RING_TYPE_TX:
		break;
	default:
		break;
	}
}

/*
 * Enable interrupt on the specificed rx ring.
 */
int
ixgbe_rx_ring_intr_enable(mac_intr_handle_t intrh)
{
	ixgbe_rx_ring_t *rx_ring = (ixgbe_rx_ring_t *)intrh;
	ixgbe_t *ixgbe = rx_ring->ixgbe;
	int r_idx = rx_ring->index;
	int v_idx = rx_ring->intr_vector;

	mutex_enter(&ixgbe->gen_lock);
	ASSERT(BT_TEST(ixgbe->vect_map[v_idx].rx_map, r_idx) == 0);

	/*
	 * To enable interrupt by setting the VAL bit of given interrupt
	 * vector allocation register (IVAR).
	 */
	ixgbe_enable_ivar(ixgbe, r_idx, 0);

	BT_SET(ixgbe->vect_map[v_idx].rx_map, r_idx);

	/*
	 * To trigger a Rx interrupt to on this ring
	 */
	IXGBE_WRITE_REG(&ixgbe->hw, IXGBE_EICS, (1 << v_idx));
	IXGBE_WRITE_FLUSH(&ixgbe->hw);

	mutex_exit(&ixgbe->gen_lock);

	return (0);
}

/*
 * Disable interrupt on the specificed rx ring.
 */
int
ixgbe_rx_ring_intr_disable(mac_intr_handle_t intrh)
{
	ixgbe_rx_ring_t *rx_ring = (ixgbe_rx_ring_t *)intrh;
	ixgbe_t *ixgbe = rx_ring->ixgbe;
	int r_idx = rx_ring->index;
	int v_idx = rx_ring->intr_vector;

	mutex_enter(&ixgbe->gen_lock);

	ASSERT(BT_TEST(ixgbe->vect_map[v_idx].rx_map, r_idx) == 1);

	/*
	 * To disable interrupt by clearing the VAL bit of given interrupt
	 * vector allocation register (IVAR).
	 */
	ixgbe_disable_ivar(ixgbe, r_idx, 0);

	BT_CLEAR(ixgbe->vect_map[v_idx].rx_map, r_idx);

	mutex_exit(&ixgbe->gen_lock);

	return (0);
}

/*
 * Add a mac address.
 */
static int
ixgbe_addmac(void *arg, const uint8_t *mac_addr)
{
	ixgbe_rx_group_t *rx_group = (ixgbe_rx_group_t *)arg;
	ixgbe_t *ixgbe = rx_group->ixgbe;
	int slot;
	int err;

	mutex_enter(&ixgbe->gen_lock);

	if (ixgbe->ixgbe_state & IXGBE_SUSPENDED) {
		mutex_exit(&ixgbe->gen_lock);
		return (ECANCELED);
	}

	if (ixgbe->unicst_avail == 0) {
		/* no slots available */
		mutex_exit(&ixgbe->gen_lock);
		return (ENOSPC);
	}

	for (slot = 0; slot < ixgbe->unicst_total; slot++) {
		if (ixgbe->unicst_addr[slot].mac.set == 0)
			break;
	}

	ASSERT((slot >= 0) && (slot < ixgbe->unicst_total));

	if ((err = ixgbe_unicst_set(ixgbe, mac_addr, slot)) == 0) {
		ixgbe->unicst_addr[slot].mac.set = 1;
		ixgbe->unicst_avail--;
	}

	mutex_exit(&ixgbe->gen_lock);

	return (err);
}

/*
 * Remove a mac address.
 */
static int
ixgbe_remmac(void *arg, const uint8_t *mac_addr)
{
	ixgbe_rx_group_t *rx_group = (ixgbe_rx_group_t *)arg;
	ixgbe_t *ixgbe = rx_group->ixgbe;
	int slot;
	int err;

	mutex_enter(&ixgbe->gen_lock);

	if (ixgbe->ixgbe_state & IXGBE_SUSPENDED) {
		mutex_exit(&ixgbe->gen_lock);
		return (ECANCELED);
	}

	slot = ixgbe_unicst_find(ixgbe, mac_addr);
	if (slot == -1) {
		mutex_exit(&ixgbe->gen_lock);
		return (EINVAL);
	}

	if (ixgbe->unicst_addr[slot].mac.set == 0) {
		mutex_exit(&ixgbe->gen_lock);
		return (EINVAL);
	}

	bzero(ixgbe->unicst_addr[slot].mac.addr, ETHERADDRL);
	if ((err = ixgbe_unicst_set(ixgbe,
	    ixgbe->unicst_addr[slot].mac.addr, slot)) == 0) {
		ixgbe->unicst_addr[slot].mac.set = 0;
		ixgbe->unicst_avail++;
	}

	mutex_exit(&ixgbe->gen_lock);

	return (err);
}